RPOARCHIVE
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    Fuzzy match across codes, option descriptions, and model aliases. Every result is graded and, where the factory documents it, cited.

    Chevrolet · 1983-1991

    C/K pickup — Square body (1983–1991)

    c/k pickup · r/v pickup

    121 option rows 121 RPO codes 7 model years
    96% Factory-verified
    • ✓ Factory-verified · 116
    • ● Confirmed · 0
    • ◑ Single-source · 5
    • ⚠ Disputed · 0

    Applicable options

    Documented RPO codes

    Have a VIN? Decode it at DecodeThis
    Model year
    Code Option Years Notes & factory source Confidence
    Engines
    L03 Engine, 5.0L V8, electronic fuel injection 1987
    the 1987 power team pages list the 5.0 liter (305 cu in) V8 with electronic fuel injection; the kit pages also print LO3
    GM Heritage factory kit — 1987 Chevrolet Truck, p.37.
    		Factory-verified
    L05 Engine, 5.7L V8, electronic fuel injection 1987, 1988
    the 1987 power team pages list the 5.7 liter (350 cu in) V8 with electronic fuel injection; the kit pages also print LO5; 1988 from the 1988 engine data page, which names the R/V 20 bonus and crew cab and R/V 30 pickups
    GM Heritage factory kit — 1987 Chevrolet Truck, p.37.
    GM Heritage factory kit — 1988 Chevrolet Truck, p.41.
    		Factory-verified
    L19 Engine, 7.4L V8, electronic fuel injection 1987, 1988
    the 1987 power team pages list the 7.4 liter (454 cu in) V8 with electronic fuel injection; 1988 from the 1988 engine data page, which names the R/V 20 bonus and crew cab and R/V 30 pickups
    GM Heritage factory kit — 1987 Chevrolet Truck, p.39.
    GM Heritage factory kit — 1988 Chevrolet Truck, p.54.
    		Factory-verified
    L25 Engine, 4.8L L6, 1 barrel 1983–1987
    the option pages list the 4.8 liter (292 cu in) 1 barrel L6 for heavy chassis and 30 series trucks; a 1987 value-features page (p.13) calls the 4.8L L6 discontinued, but the February 1987 power team and option pages still list it
    GM Heritage factory kit — 1983 Chevrolet Truck, p.15.
    GM Heritage factory kit — 1984 Chevrolet Truck, p.23.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.23.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.166.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.43.
    		Factory-verified
    LB1 Engine, 4.3L V6, 4 barrel 1985, 1986
    the 1986 option page lists the 4.3 liter (262 cu in) 4 barrel V6
    GM Heritage factory kit — 1985 Chevrolet Truck, p.23.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.20.
    		Factory-verified
    LB4 Engine, 4.3L V6, electronic fuel injection 1987
    the 1987 option page lists the 4.3 liter (262 cu in) V6 with electronic fuel injection
    GM Heritage factory kit — 1987 Chevrolet Truck, p.51.
    		Factory-verified
    LE3 Engine, 4.1L L6, 2 barrel 1983, 1984
    the 1984 option page lists the 4.1 liter (250 cu in) 2 barrel L6
    GM Heritage factory kit — 1983 Chevrolet Truck, p.13.
    GM Heritage factory kit — 1984 Chevrolet Truck, p.21.
    		Factory-verified
    LE8 Engine, 7.4L V8, 4 barrel 1983–1986
    the option pages list the 7.4 liter (454 cu in) 4 barrel V8
    GM Heritage factory kit — 1983 Chevrolet Truck, p.15.
    GM Heritage factory kit — 1984 Chevrolet Truck, p.23.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.23.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.22.
    		Factory-verified
    LE9 Engine, 5.0L V8, 4 barrel 1983–1986
    the option pages list the 5.0 liter (305 cu in) 4 barrel V8; the 1987 value-features page names the 5.0L EFI engine LE9 while the 1987 power team and option pages print L03, so 1987 is left to L03
    GM Heritage factory kit — 1983 Chevrolet Truck, p.13.
    GM Heritage factory kit — 1984 Chevrolet Truck, p.21.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.21.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.20.
    		Factory-verified
    LF3 Engine, 5.0L V8, 4 barrel, California 1984–1986
    the 1984 option page offers it on 2WD 10 series only with YF5 California emissions and the MX0 automatic
    GM Heritage factory kit — 1984 Chevrolet Truck, p.37.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.92.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.64.
    		Factory-verified
    LH6 Engine, diesel, 6.2L V8 1983–1987
    light duty emissions version of the 6.2 liter (379 cu in) diesel; requires B3J diesel equipment
    GM Heritage factory kit — 1983 Chevrolet Truck, p.13.
    GM Heritage factory kit — 1984 Chevrolet Truck, p.21.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.21.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.20.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.37.
    		Factory-verified
    LL4 Engine, diesel, 6.2L V8, heavy duty 1983–1988
    heavy duty emissions version of the 6.2 liter diesel; requires B3J diesel equipment; 1988 from the 1988 engine data page, which names the R/V 20 bonus and crew cab and R/V 30 pickups
    GM Heritage factory kit — 1983 Chevrolet Truck, p.15.
    GM Heritage factory kit — 1984 Chevrolet Truck, p.23.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.23.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.22.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.39.
    GM Heritage factory kit — 1988 Chevrolet Truck, p.50.
    		Factory-verified
    LS9 Engine, 5.7L V8, 4 barrel 1984–1986
    the option pages list the 5.7 liter (350 cu in) 4 barrel V8
    GM Heritage factory kit — 1984 Chevrolet Truck, p.22.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.22.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.21.
    		Factory-verified
    LT9 Engine, 5.7L V8, 4 barrel, heavy duty 1983–1986
    the option pages offer this 5.7 liter (350 cu in) 4 barrel V8 with the heavy duty chassis (C6P), the 20 series bonus and crew cab and 30 series
    GM Heritage factory kit — 1983 Chevrolet Truck, p.15.
    GM Heritage factory kit — 1984 Chevrolet Truck, p.23.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.25.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.22.
    		Factory-verified
    Transmissions
    MM3 Transmission, manual, 3 speed 1983–1987
    GM Heritage factory kit — 1983 Chevrolet Truck, p.13.
    GM Heritage factory kit — 1984 Chevrolet Truck, p.22.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.21.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.20.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.37.
    		Factory-verified
    MM4 Transmission, manual, 4 speed 1983–1987
    GM Heritage factory kit — 1983 Chevrolet Truck, p.13.
    GM Heritage factory kit — 1984 Chevrolet Truck, p.23.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.21.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.20.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.37.
    		Factory-verified
    MM7 Transmission, manual, 4 speed, overdrive 1983–1987
    GM Heritage factory kit — 1983 Chevrolet Truck, p.13.
    GM Heritage factory kit — 1984 Chevrolet Truck, p.22.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.21.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.20.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.37.
    		Factory-verified
    MX0 Transmission, 4 speed automatic, overdrive 1983–1987
    the kit pages also print MXO
    GM Heritage factory kit — 1983 Chevrolet Truck, p.13.
    GM Heritage factory kit — 1984 Chevrolet Truck, p.22.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.21.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.20.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.37.
    		Factory-verified
    MX1 Transmission, 3 speed automatic 1983–1987
    the kit pages also print MXI
    GM Heritage factory kit — 1983 Chevrolet Truck, p.13.
    GM Heritage factory kit — 1984 Chevrolet Truck, p.21.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.21.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.20.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.37.
    		Factory-verified
    Axles
    G80 Axle, rear, locking differential 1983–1987
    the kits print it as the locking differential; the GMT400 doc reads it from GM lists as Positraction; the kit pages also print G8O
    GM Heritage factory kit — 1983 Chevrolet Truck, p.16.
    GM Heritage factory kit — 1984 Chevrolet Truck, p.21.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.23.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.22.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.39.
    		Factory-verified
    GQ1 Axle, rear, standard, non-locking 1983–1987
    the power team charts print it in nearly every team; the meaning comes from 73-87.com, which reads it as the standard (non-Positraction) rear axle
    GM Heritage factory kit — 1983 Chevrolet Truck, p.13.
    GM Heritage factory kit — 1984 Chevrolet Truck, p.21.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.21.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.20.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.37.
    		Single-source
    GT4 Axle, rear, 3.73 ratio 1983–1987
    power team charts only
    GM Heritage factory kit — 1983 Chevrolet Truck, p.13.
    GM Heritage factory kit — 1984 Chevrolet Truck, p.21.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.21.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.20.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.37.
    		Factory-verified
    GT5 Axle, rear, 4.10 ratio 1983–1987
    power team charts only
    GM Heritage factory kit — 1983 Chevrolet Truck, p.15.
    GM Heritage factory kit — 1984 Chevrolet Truck, p.23.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.23.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.22.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.39.
    		Factory-verified
    GU2 Axle, rear, 2.73 ratio 1983, 1984
    power team charts only
    GM Heritage factory kit — 1983 Chevrolet Truck, p.13.
    GM Heritage factory kit — 1984 Chevrolet Truck, p.21.
    		Factory-verified
    GU4 Axle, rear, 3.08 ratio 1983–1987
    power team charts only
    GM Heritage factory kit — 1983 Chevrolet Truck, p.13.
    GM Heritage factory kit — 1984 Chevrolet Truck, p.21.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.21.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.20.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.37.
    		Factory-verified
    GU6 Axle, rear, 3.42 ratio 1983–1987
    power team charts only
    GM Heritage factory kit — 1983 Chevrolet Truck, p.13.
    GM Heritage factory kit — 1984 Chevrolet Truck, p.21.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.21.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.20.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.37.
    		Factory-verified
    HC4 Axle, rear, 4.56 ratio 1983–1987
    power team charts only
    GM Heritage factory kit — 1983 Chevrolet Truck, p.15.
    GM Heritage factory kit — 1984 Chevrolet Truck, p.23.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.23.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.22.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.39.
    		Factory-verified
    Packages & Trims
    V22 Appearance package, deluxe front 1984–1987
    the 1987 page names dual rectangular headlamps and a grille with a body color center bar; included with YE9; the GMT400 doc reads it from GM lists as a chrome radiator grille
    GM Heritage factory kit — 1984 Chevrolet Truck, p.43.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.43.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.160.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.56.
    		Factory-verified
    YE9 Decor package, Silverado 1983–1987
    the kits name it the Silverado model option; the GMT400 doc reads it from GM lists as comfort and decor level 3
    GM Heritage factory kit — 1983 Chevrolet Truck, p.28.
    GM Heritage factory kit — 1984 Chevrolet Truck, p.35.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.34.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.168.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.50.
    		Factory-verified
    YG1 Molding package, custom 1984–1987
    fleetside only; the kit pages also print YGI
    GM Heritage factory kit — 1984 Chevrolet Truck, p.36.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.35.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.158.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.51.
    		Factory-verified
    YG3 Molding package, deluxe 1984–1987
    fleetside only; included with YE9
    GM Heritage factory kit — 1984 Chevrolet Truck, p.35.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.34.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.157.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.59.
    		Factory-verified
    YJ6 Value decor package 1984–1987
    solid paint with body striping and a black painted grille; not on bonus cab, crew cab or stepside; 10 series includes N67 rally wheels; 1984 rests on a cross-reference: p.35 names the YJ6 Value Decor Package only in a weight-table line, and the description page (p.67) OCRs the code as YJ6I
    GM Heritage factory kit — 1984 Chevrolet Truck, p.35.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.66.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.159.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.82.
    		Factory-verified
    Z62 Decor package, Scottsdale 1983–1987
    the kits name it the Scottsdale model option
    GM Heritage factory kit — 1983 Chevrolet Truck, p.27.
    GM Heritage factory kit — 1984 Chevrolet Truck, p.35.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.34.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.157.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.49.
    		Factory-verified
    ZQ2 Operating convenience package 1984–1987
    includes AU3 power door locks and A31 power windows
    GM Heritage factory kit — 1984 Chevrolet Truck, p.46.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.43.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.157.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.59.
    		Factory-verified
    Equipment
    A01 Glass, tinted, all windows 1984–1987
    the kit pages also print AO1
    GM Heritage factory kit — 1984 Chevrolet Truck, p.48.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.46.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.155.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.58.
    		Factory-verified
    A28 Window, rear, sliding 1984–1987
    GM Heritage factory kit — 1984 Chevrolet Truck, p.48.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.46.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.155.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.61.
    		Factory-verified
    A31 Window, power 1984–1987
    1985 and 1986 cite the pickup pages (1985 p.44, 1986 p.157), which name A31 Power Windows in the Operating Convenience Package contents; the option line itself is printed on the chassis-cab option pages (1985 p.243, 1986 p.103), which are not cited
    GM Heritage factory kit — 1984 Chevrolet Truck, p.48.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.44.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.157.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.61.
    		Factory-verified
    AS3 Body, crew cab 1983–1987, 1991
    the kits print it with E63 as the crew cab body ordering code; GM later used AS3 for a rear seat on other trucks; 1991 from the 1991 truck-camper page, which prints the R/V 3500 bonus and crew cab models (R/V30943)
    GM Heritage factory kit — 1983 Chevrolet Truck, p.4.
    GM Heritage factory kit — 1984 Chevrolet Truck, p.34.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.33.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.169.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.48.
    GM Heritage factory kit — 1991 Chevrolet Truck, p.64.
    		Factory-verified
    AU3 Locks, power door 1984–1987
    GM Heritage factory kit — 1984 Chevrolet Truck, p.46.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.43.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.157.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.58.
    		Factory-verified
    B32 Floor mats, front, color-keyed 1984, 1987
    the 1985 (p.43) and 1986 (p.159) kit pages print the code as 832, which is not an accepted reading, so those years are left out
    GM Heritage factory kit — 1984 Chevrolet Truck, p.45.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.58.
    		Factory-verified
    B3J Equipment, diesel 1983–1987
    required with the LH6 and LL4 diesels
    GM Heritage factory kit — 1983 Chevrolet Truck, p.13.
    GM Heritage factory kit — 1984 Chevrolet Truck, p.33.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.33.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.155.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.48.
    		Factory-verified
    B84 Moldings, body side, black 1984–1987
    fleetside only
    GM Heritage factory kit — 1984 Chevrolet Truck, p.35.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.34.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.158.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.49.
    		Factory-verified
    B85 Moldings, body side, bright 1984–1987
    fleetside only
    GM Heritage factory kit — 1984 Chevrolet Truck, p.45.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.35.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.157.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.58.
    		Factory-verified
    B93 Guards, door edge 1986
    the 1984 kit page (p.46) prints the code as 893, which is not an accepted reading, so 1984 is left out
    GM Heritage factory kit — 1986 Chevrolet Truck, p.157.
    		Factory-verified
    C42 Heater, front, heavy duty 1985–1987
    not with C60 air conditioning
    GM Heritage factory kit — 1985 Chevrolet Truck, p.43.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.158.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.58.
    		Factory-verified
    C60 Air conditioning, All-Weather 1983–1987
    the GMT400 doc reads it from GM lists as front air conditioning; the kit pages also print C6O
    GM Heritage factory kit — 1983 Chevrolet Truck, p.18.
    GM Heritage factory kit — 1984 Chevrolet Truck, p.43.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.43.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.155.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.57.
    		Factory-verified
    C6P Chassis, heavy duty 1983–1987
    20 series heavy duty chassis; the 1998–2000 GMT400 lists read C6P as an 8,600 lb GVW rating
    GM Heritage factory kit — 1983 Chevrolet Truck, p.4.
    GM Heritage factory kit — 1984 Chevrolet Truck, p.37.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.36.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.156.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.49.
    		Factory-verified
    C91 Lamp, dome 1984–1987
    GM Heritage factory kit — 1984 Chevrolet Truck, p.35.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.34.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.158.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.49.
    		Factory-verified
    CD4 Wipers, windshield, intermittent 1984–1987
    not with the 3 speed manual (MM3)
    GM Heritage factory kit — 1984 Chevrolet Truck, p.48.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.46.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.155.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.61.
    		Factory-verified
    D44 Mirror, outside, below eye line, painted 1986
    9 x 6.5 inch, left-hand and right-hand
    GM Heritage factory kit — 1986 Chevrolet Truck, p.158.
    		Factory-verified
    D45 Mirror, outside, below eye line, stainless steel 1986
    9 x 6.5 inch, left-hand and right-hand
    GM Heritage factory kit — 1986 Chevrolet Truck, p.158.
    		Factory-verified
    D73 Rails, pickup box side 1984, 1986, 1987
    GM Heritage factory kit — 1984 Chevrolet Truck, p.46.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.157.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.59.
    		Factory-verified
    DF2 Mirror, outside, left-hand and right-hand, camper style, stainless steel 1984, 1987
    7.5 x 10.5 inch head on adjustable arms
    GM Heritage factory kit — 1984 Chevrolet Truck, p.45.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.58.
    		Factory-verified
    DG5 Mirror, outside, senior West Coast type, painted 1984, 1986, 1987
    only in: 30 series; shipped loose for dealer installation
    GM Heritage factory kit — 1984 Chevrolet Truck, p.45.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.158.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.58.
    		Factory-verified
    E62 Body equipment, stepside pickup box 1983–1987
    printed as the Stepside/Fenderside body ordering code
    GM Heritage factory kit — 1983 Chevrolet Truck, p.4.
    GM Heritage factory kit — 1984 Chevrolet Truck, p.33.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.33.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.169.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.48.
    		Factory-verified
    E63 Body equipment, fleetside pickup box 1983–1987, 1991
    printed as the Fleetside/Wideside body ordering code; 1991 from the 1991 truck-camper page, which prints the R/V 3500 bonus and crew cab models (R/V30943)
    GM Heritage factory kit — 1983 Chevrolet Truck, p.4.
    GM Heritage factory kit — 1984 Chevrolet Truck, p.33.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.33.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.169.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.48.
    GM Heritage factory kit — 1991 Chevrolet Truck, p.64.
    		Factory-verified
    F51 Shock absorbers, front and rear, heavy duty 1984–1987
    GM Heritage factory kit — 1984 Chevrolet Truck, p.46.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.44.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.157.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.59.
    		Factory-verified
    F58 Stabilizer bar, front, heavy duty 1984–1987
    GM Heritage factory kit — 1984 Chevrolet Truck, p.44.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.45.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.156.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.57.
    		Factory-verified
    F59 Stabilizer bar, front 1985–1987
    printed in the stabilizer bar block of the option pages; the meaning comes from 73-87.com
    GM Heritage factory kit — 1985 Chevrolet Truck, p.45.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.156.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.60.
    		Single-source
    F60 Spring, front, heavy duty 1984–1987
    the kit pages also print F6O
    GM Heritage factory kit — 1984 Chevrolet Truck, p.44.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.42.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.156.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.57.
    		Factory-verified
    G50 Spring, rear, heavy duty 1983–1987
    the kit pages also print G5O
    GM Heritage factory kit — 1983 Chevrolet Truck, p.21.
    GM Heritage factory kit — 1984 Chevrolet Truck, p.47.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.42.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.156.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.60.
    		Factory-verified
    G51 Spring, rear, extra capacity 1983–1987
    GM Heritage factory kit — 1983 Chevrolet Truck, p.20.
    GM Heritage factory kit — 1984 Chevrolet Truck, p.47.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.42.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.156.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.60.
    		Factory-verified
    G60 Spring, rear, main and auxiliary 1984–1987
    GM Heritage factory kit — 1984 Chevrolet Truck, p.47.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.42.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.155.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.57.
    		Factory-verified
    J50 Brakes, power 1984, 1986, 1987
    GM Heritage factory kit — 1984 Chevrolet Truck, p.46.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.160.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.59.
    		Factory-verified
    J55 Brakes, power, heavy duty 1984–1987
    GM Heritage factory kit — 1984 Chevrolet Truck, p.43.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.45.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.160.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.57.
    		Factory-verified
    K05 Heater, engine block 1985–1987
    600 watt, 120 volt; included with V10; the kit pages also print KO5
    GM Heritage factory kit — 1985 Chevrolet Truck, p.42.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.158.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.58.
    		Factory-verified
    K22 Generator, 94 amp 1986
    GM Heritage factory kit — 1986 Chevrolet Truck, p.159.
    		Factory-verified
    K34 Speed control, electronic 1986, 1987
    GM Heritage factory kit — 1986 Chevrolet Truck, p.157.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.59.
    		Factory-verified
    K46 Air cleaner, pre-cleaner 1986, 1987
    not with the L25 4.8L
    GM Heritage factory kit — 1986 Chevrolet Truck, p.160.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.56.
    		Factory-verified
    K81 Generator, 66 amp 1983–1986
    GM Heritage factory kit — 1983 Chevrolet Truck, p.23.
    GM Heritage factory kit — 1984 Chevrolet Truck, p.45.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.43.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.159.
    		Factory-verified
    KC4 Cooling system, engine oil 1985–1987
    the kits print it as the engine oil cooler
    GM Heritage factory kit — 1985 Chevrolet Truck, p.21.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.159.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.56.
    		Factory-verified
    N33 Steering wheel, Comfortilt 1986, 1987
    not with the 3 speed manual (MM3)
    GM Heritage factory kit — 1986 Chevrolet Truck, p.156.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.60.
    		Factory-verified
    N41 Steering, power 1983–1987
    GM Heritage factory kit — 1983 Chevrolet Truck, p.15.
    GM Heritage factory kit — 1984 Chevrolet Truck, p.23.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.36.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.156.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.39.
    		Factory-verified
    N51 Steering, power, not desired 1984–1987
    no-charge delete of power steering
    GM Heritage factory kit — 1984 Chevrolet Truck, p.47.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.45.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.156.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.60.
    		Factory-verified
    N67 Wheels, rally 1983–1987
    only in: 10 series; special hub caps and trim rings
    GM Heritage factory kit — 1983 Chevrolet Truck, p.20.
    GM Heritage factory kit — 1984 Chevrolet Truck, p.38.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.37.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.159.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.52.
    		Factory-verified
    N90 Wheels, aluminum, cast 1985–1987
    only in: 10 series; four 15 x 7 wheels; the kit pages also print N9O
    GM Heritage factory kit — 1985 Chevrolet Truck, p.37.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.155.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.54.
    		Factory-verified
    NL2 Fuel tank, auxiliary 1984–1987
    right-hand frame mounted
    GM Heritage factory kit — 1984 Chevrolet Truck, p.47.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.46.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.156.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.60.
    		Factory-verified
    NY7 Shield, transfer case 1984–1987
    only in: 4WD
    GM Heritage factory kit — 1984 Chevrolet Truck, p.46.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.44.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.157.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.59.
    		Factory-verified
    P01 Wheel covers, bright metal 1984–1987
    the kit pages also print PO1
    GM Heritage factory kit — 1984 Chevrolet Truck, p.48.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.46.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.155.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.60.
    		Factory-verified
    P13 Carrier, spare tire, side mounted 1987
    fleetside only; printed in the spare carrier block of the 1987 option page; the meaning comes from 73-87.com
    GM Heritage factory kit — 1987 Chevrolet Truck, p.57.
    		Single-source
    PA1 Wheel covers, special 1984–1987
    the kit pages also print PAI
    GM Heritage factory kit — 1984 Chevrolet Truck, p.48.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.46.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.155.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.62.
    		Factory-verified
    PA6 Wheels, styled 1983–1987
    only in: 10 series; special hub caps
    GM Heritage factory kit — 1983 Chevrolet Truck, p.20.
    GM Heritage factory kit — 1984 Chevrolet Truck, p.27.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.37.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.159.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.54.
    		Factory-verified
    PF2 Wheels, aluminum, forged 1987
    only in: 10 series; four 15 x 7 wheels
    GM Heritage factory kit — 1987 Chevrolet Truck, p.61.
    		Factory-verified
    R04 Wheel, single rear 1984–1987
    only in: 30 series fleetside; the kit pages also print RO4
    GM Heritage factory kit — 1984 Chevrolet Truck, p.48.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.46.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.155.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.63.
    		Factory-verified
    R05 Wheel, dual rear 1983–1987
    only in: 30 series fleetside; the kit pages also print RO5
    GM Heritage factory kit — 1983 Chevrolet Truck, p.22.
    GM Heritage factory kit — 1984 Chevrolet Truck, p.35.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.34.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.155.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.49.
    		Factory-verified
    TP2 Battery, auxiliary 1984, 1986, 1987
    GM Heritage factory kit — 1984 Chevrolet Truck, p.43.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.160.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.56.
    		Factory-verified
    TT5 Headlamps, halogen high beam 1985–1987
    the 1984 kit page (p.45) prints the code as TTS, which is not an accepted reading, so 1984 is left out
    GM Heritage factory kit — 1985 Chevrolet Truck, p.43.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.158.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.58.
    		Factory-verified
    U01 Lamp, roof marker, five 1984–1987
    included with R05 dual rear wheels; the kit pages also print UO1
    GM Heritage factory kit — 1984 Chevrolet Truck, p.48.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.43.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.158.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.58.
    		Factory-verified
    U35 Clock, electric, quartz 1983, 1985–1987
    the 1985 (p.43) and 1986 (p.159) kit pages print U35 only in the Z53 gauge cross-reference, beside the quartz electric clock description; 1987 p.57 prints the option line
    GM Heritage factory kit — 1983 Chevrolet Truck, p.33.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.43.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.159.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.57.
    		Factory-verified
    U37 Lighter, cigarette 1985–1987
    GM Heritage factory kit — 1985 Chevrolet Truck, p.34.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.158.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.49.
    		Factory-verified
    U58 Radio, AM/FM stereo 1984–1987
    GM Heritage factory kit — 1984 Chevrolet Truck, p.46.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.44.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.157.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.59.
    		Factory-verified
    U63 Radio, AM 1984–1987
    GM Heritage factory kit — 1984 Chevrolet Truck, p.46.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.44.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.157.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.59.
    		Factory-verified
    U69 Radio, AM/FM 1984–1987
    GM Heritage factory kit — 1984 Chevrolet Truck, p.46.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.44.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.157.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.59.
    		Factory-verified
    U76 Antenna, windshield 1984–1987
    GM Heritage factory kit — 1984 Chevrolet Truck, p.46.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.44.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.157.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.59.
    		Factory-verified
    UA1 Battery, heavy duty 1984–1987
    the 1985 kit page (p.42) prints UA1 only in the Cold-Climate Package cross-reference; the 1984 page (p.43) prints the battery line as UAI
    GM Heritage factory kit — 1984 Chevrolet Truck, p.43.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.42.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.160.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.56.
    		Factory-verified
    UF2 Lamp, cargo area 1984, 1987
    the 1984 (p.45) and 1987 (p.58) kit pickup pages print UF2 only in the C91 dome lamp cross-reference; 1985 and 1986 are left out because the only kit pages that print it as an option line are the C-K chassis-cab option pages (1985 p.243, 1986 p.105), which do not show a pickup application
    GM Heritage factory kit — 1984 Chevrolet Truck, p.45.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.58.
    		Factory-verified
    UM6 Radio, AM/FM stereo, electronically tuned, seek and scan, cassette tape, digital clock 1986, 1987
    GM Heritage factory kit — 1986 Chevrolet Truck, p.157.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.59.
    		Factory-verified
    UN3 Radio, AM/FM stereo, cassette tape 1984–1987
    GM Heritage factory kit — 1984 Chevrolet Truck, p.46.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.44.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.157.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.59.
    		Factory-verified
    V01 Radiator, heavy duty 1984–1987
    the kit pages also print VO1, VOI
    GM Heritage factory kit — 1984 Chevrolet Truck, p.44.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.43.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.159.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.57.
    		Factory-verified
    V02 Radiator and transmission oil cooler, heavy duty 1983–1987
    automatic transmissions only; the kit pages also print VO2
    GM Heritage factory kit — 1983 Chevrolet Truck, p.18.
    GM Heritage factory kit — 1984 Chevrolet Truck, p.44.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.43.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.159.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.61.
    		Factory-verified
    V10 Package, cold climate 1984–1987
    includes special insulation, a special heater and defroster, K05 engine block heater and UA1 heavy duty battery; the GMT400 doc reads it from GM lists as cold climate provisions; the 1985 kit page (p.42) prints V10 only in a cross-reference (the Cold-Climate Package line itself is garbled in the OCR)
    GM Heritage factory kit — 1984 Chevrolet Truck, p.44.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.42.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.159.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.57.
    		Factory-verified
    V31 Guards, front bumper, chromed 1984–1987
    GM Heritage factory kit — 1984 Chevrolet Truck, p.43.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.42.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.160.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.57.
    		Factory-verified
    V42 Bumper, rear step, chromed 1984–1986
    printed in the chromed bumper block of the option pages; the meaning comes from 73-87.com
    GM Heritage factory kit — 1984 Chevrolet Truck, p.43.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.42.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.160.
    		Single-source
    V43 Bumper, rear step, painted 1984–1987
    GM Heritage factory kit — 1984 Chevrolet Truck, p.43.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.42.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.160.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.57.
    		Factory-verified
    V76 Tow hooks, front 1984–1987
    GM Heritage factory kit — 1984 Chevrolet Truck, p.48.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.46.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.155.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.60.
    		Factory-verified
    VF1 Bumper, rear, chromed 1984–1986
    printed in the chromed bumper block of the option pages; the meaning comes from 73-87.com
    GM Heritage factory kit — 1984 Chevrolet Truck, p.43.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.42.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.160.
    		Single-source
    YG4 Body, bonus cab 1983–1987, 1991
    the kits print it with E63 as the bonus cab body ordering code; GM later used YG4 for "seats, optional, not desired" on other trucks; 1991 from the 1991 truck-camper page, which prints the R/V 3500 bonus and crew cab models (R/V30943)
    GM Heritage factory kit — 1983 Chevrolet Truck, p.4.
    GM Heritage factory kit — 1984 Chevrolet Truck, p.4.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.33.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.169.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.48.
    GM Heritage factory kit — 1991 Chevrolet Truck, p.64.
    		Factory-verified
    Z53 Gages, voltmeter, temperature and oil pressure 1983–1987
    GM Heritage factory kit — 1983 Chevrolet Truck, p.33.
    GM Heritage factory kit — 1984 Chevrolet Truck, p.44.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.34.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.159.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.49.
    		Factory-verified
    Z75 Shock absorbers, front, quad 1984–1987
    only in: 4WD 10 and 20 series regular cab; includes heavy duty rear shocks and a front axle bumper
    GM Heritage factory kit — 1984 Chevrolet Truck, p.47.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.45.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.157.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.60.
    		Factory-verified
    Z76 Commercial chassis equipment, special 1984–1987
    only in: 2WD 30 series fleetside with R05 dual rear wheels; includes F58 front stabilizer, a rear stabilizer and G60 rear springs; all four kit pages print Z76 only in cross-references to other options (the Commercial Chassis Equipment line has no legible code)
    GM Heritage factory kit — 1984 Chevrolet Truck, p.47.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.45.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.155.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.60.
    		Factory-verified
    Z81 Camper special chassis equipment 1984–1987
    includes camper body wiring harness; the 1984 (p.47), 1985 (p.45) and 1987 (p.57) kit pages print Z81 only in cross-references (the Camper Special Chassis Equipment line has no legible code); 1986 p.160 prints the option line
    GM Heritage factory kit — 1984 Chevrolet Truck, p.47.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.45.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.160.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.57.
    		Factory-verified
    Paint
    ZY1 Color combination, solid 1983–1987
    GM Heritage factory kit — 1983 Chevrolet Truck, p.21.
    GM Heritage factory kit — 1984 Chevrolet Truck, p.36.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.43.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.167.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.50.
    		Factory-verified
    ZY2 Color combination, conventional two-tone 1983–1987
    GM Heritage factory kit — 1983 Chevrolet Truck, p.37.
    GM Heritage factory kit — 1984 Chevrolet Truck, p.63.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.63.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.167.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.50.
    		Factory-verified
    ZY3 Color combination, special two-tone 1983–1987
    fleetside only
    GM Heritage factory kit — 1983 Chevrolet Truck, p.37.
    GM Heritage factory kit — 1984 Chevrolet Truck, p.36.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.44.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.167.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.51.
    		Factory-verified
    ZY4 Color combination, deluxe two-tone 1983–1987
    fleetside only
    GM Heritage factory kit — 1983 Chevrolet Truck, p.37.
    GM Heritage factory kit — 1984 Chevrolet Truck, p.36.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.44.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.167.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.51.
    		Factory-verified
    ZY5 Color combination, exterior decor package, two-tone with striping 1983–1987
    fleetside only; dual-tone body side and rear decal striping; not with R05 dual rear wheels
    GM Heritage factory kit — 1983 Chevrolet Truck, p.37.
    GM Heritage factory kit — 1984 Chevrolet Truck, p.37.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.34.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.167.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.51.
    		Factory-verified
    ZY6 Color combination, custom two-tone 1985, 1987
    GM Heritage factory kit — 1985 Chevrolet Truck, p.34.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.77.
    		Factory-verified
    ZY9 Color combination, special two-tone, Big Dooley 1983–1987
    only in: 30 series fleetside with R05 dual rear wheels
    GM Heritage factory kit — 1983 Chevrolet Truck, p.37.
    GM Heritage factory kit — 1984 Chevrolet Truck, p.35.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.34.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.167.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.51.
    		Factory-verified
    Internal / Process
    NA5 internal Emission system, federal 1983–1987
    GM Heritage factory kit — 1983 Chevrolet Truck, p.13.
    GM Heritage factory kit — 1984 Chevrolet Truck, p.37.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.36.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.158.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.51.
    		Factory-verified
    NA6 internal Emission system, high altitude 1984–1987
    the 1984 (p.45), 1985 (p.36) and 1987 (p.51) kit pages print NA6 only in cross-references (1987 p.51 prints the option line code as NAG); 1986 p.166 prints the option line
    GM Heritage factory kit — 1984 Chevrolet Truck, p.45.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.36.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.166.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.51.
    		Factory-verified
    YF5 internal Emission system, California 1983–1987
    GM Heritage factory kit — 1983 Chevrolet Truck, p.14.
    GM Heritage factory kit — 1984 Chevrolet Truck, p.37.
    GM Heritage factory kit — 1985 Chevrolet Truck, p.36.
    GM Heritage factory kit — 1986 Chevrolet Truck, p.166.
    GM Heritage factory kit — 1987 Chevrolet Truck, p.51.
    		Factory-verified

    Source document: chevrolet/ck-squarebody.md. Rows marked — record an option the factory offered whose RPO code is not documented in the consulted sources.