Chevrolet · 1983-1988

Monte Carlo — fourth generation (1983–1988)

monte carlo

106 option rows 106 RPO codes 6 model years
100% Factory-verified
  • ✓ Factory-verified · 106
  • ● Confirmed · 0
  • ◑ Single-source · 0
  • ⚠ Disputed · 0

Applicable options

Documented RPO codes

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Model year
Monte Carlo — fourth generation (1983–1988) RPO codes
Code Option Years Notes & factory source Confidence
Engines
LC3 Engine, 3.8L V6, 229 cu in, 2 barrel 1983–1984
base V6 outside California
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
Factory-verified
LD5 Engine, 3.8L V6, 231 cu in, 2 barrel 1983–1984
the V6 with YF5 California emissions
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
Factory-verified
LG4 Engine, 5.0L V8, 305 cu in, 4 barrel 1983–1988
not on the SS
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.32.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.40.
GM Heritage factory kit — 1988 Chevrolet Monte Carlo, p.34.
Factory-verified
L69 Engine, 5.0L V8, 305 cu in, 4 barrel, high output 1983–1988
only in: SS; the engine code on the 1983 price schedule and on the specification and weight pages; the 1984–1988 guides and price pages order it as B4V
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.36.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.43.
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.43.
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.53.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.55.
GM Heritage factory kit — 1988 Chevrolet Monte Carlo, p.47.
Factory-verified
B4V Engine, 5.0L V8, 4 barrel, high output, ordering code 1984–1988
only in: SS; the guides' ordering code for the L69 engine
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.32.
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.26.
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.38.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.42.
GM Heritage factory kit — 1988 Chevrolet Monte Carlo, p.36.
Factory-verified
LF9 Engine, diesel, 5.7L V8 1983–1984
1983: V10 cold climate package recommended, and required (with C60 air conditioning) under NA6 high altitude emissions; 1984: V10 required; federal only, not in California
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
Factory-verified
LT6 Engine, diesel, 4.3L V6 1983
V10 cold climate package recommended, and required under NA6 high altitude emissions
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.30.
Factory-verified
LB4 Engine, 4.3L V6, electronic fuel injection 1985–1988
base engine; not on the SS
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.73.
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.32.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.40.
GM Heritage factory kit — 1988 Chevrolet Monte Carlo, p.34.
Factory-verified
Transmissions
MX1 Transmission, 3 speed automatic 1985–1987
1983 is left out: the 1983 guide and price pages print no transmission code, and the brochure's specification and power-team page (p.19), which prints MXI, prints no model year; 1984 is left out: only the 1984 option price page (p.33, which prints a production date but no model year) and the brochure page (p.21) print MX1; the 1988 guide offers MX0 only, though the 1988 MVMA power-team page still pairs the base LB4 with a 3 speed automatic ('200C') without a code
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.32.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.40.
Factory-verified
MX0 Transmission, 4 speed automatic, overdrive 1984–1988
the kits print MXO; 1984: with every engine except the 3.8L V6 in California, and not on the SS (weight page); standard on the SS from 1985
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.78.
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.32.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.40.
GM Heritage factory kit — 1988 Chevrolet Monte Carlo, p.34.
Factory-verified
Axles
G80 Axle, rear, limited slip differential 1983–1988
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.36.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.38.
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.73.
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.32.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.40.
GM Heritage factory kit — 1988 Chevrolet Monte Carlo, p.34.
Factory-verified
G84 Axle, rear, high altitude ratio 1983
requires NA6 high altitude emissions
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.30.
Factory-verified
G92 Axle, rear, performance ratio 1983–1988
an optional higher axle ratio, 3.08 on the 1988 power-team chart; not on the SS; 1984: not with LD5; 1985 from the power-team chart
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.34.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.32.
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.29.
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.32.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.40.
GM Heritage factory kit — 1988 Chevrolet Monte Carlo, p.34.
Factory-verified
Packages & Trims
Z65 SS sport coupe, model option 1983–1987
model 1GZ37/Z65; special instrumentation with tachometer, sport suspension, rear spoiler, Rally wheels (aluminum wheels from 1986), sport mirrors and P215/65R15 white-lettered tires; 1988 is left out: the 1988 SS guide page (p.36) sells the Monte Carlo SS sport coupe, model 1GZ37, without printing Z65, and the MVMA page that prints 1GZ37 (Z65) (p.46) prints its model year as 'T988'; the tentative price pages are not used
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.32.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.38.
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.32.
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.36.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.42.
Factory-verified
Z09 Monte Carlo LS, model option 1986
model 1GZ37/Z09; its own front, side and rear appearance with composite halogen headlamps and specific taillamps; the 1987–1988 kits name the base 1GZ37 coupe the LS and print no Z09
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.34.
Factory-verified
Z16 SS Aero Coupe, model option 1987
the 1987 guide and price pages; a 1988 specification page still heads a column with the Z16 option, apparently carried over, so 1988 is not claimed; Wikipedia dates the Aero Coupe 1986–1987, but the 1986 kit does not show it
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.43.
Factory-verified
V10 Cold climate package 1983–1984
for the diesel engines; includes the UA1 heavy duty battery and an engine block and fuel line heater
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.36.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
Factory-verified
1SA Option package 1 1988
LS and SS; the base package; the LS guide's restriction remarks also call it MLA1
GM Heritage factory kit — 1988 Chevrolet Monte Carlo, p.34.
GM Heritage factory kit — 1988 Chevrolet Monte Carlo, p.36.
Factory-verified
1SB Option package 2 1988
LS: air conditioning, front and rear floor mats, auxiliary lighting, body side molding, tilt wheel, cruise control and intermittent wipers; SS: the SS guide page (p.36) shows option package 2 with its code illegible, listing air conditioning, floor mats, power locks and windows, halogen headlamps, auxiliary lighting, twin remote mirrors, cassette radio, tilt wheel, power trunk opener and intermittent wipers; the tentative price pages are not used; the guides' restriction remarks also call it MLA2 (LS) and MZA2 (SS)
GM Heritage factory kit — 1988 Chevrolet Monte Carlo, p.34.
Factory-verified
1SC Option package 3 1988
only in: LS; package 2 plus power locks, windows and trunk opener, gauge package, twin remote mirrors, door edge guards, sill moldings and cassette radio; the LS guide's restriction remarks also call it MLA3
GM Heritage factory kit — 1988 Chevrolet Monte Carlo, p.34.
Factory-verified
Equipment
AG9 Seat, power, 6 way, driver 1983–1988
requires the 55/45 seat; 1985 from the weight page, as the guide prints AGS
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.71.
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.32.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.40.
GM Heritage factory kit — 1988 Chevrolet Monte Carlo, p.34.
Factory-verified
AM6 Seat, front, 55/45 1984–1985, 1987–1988
weight pages only: the 1984–1985 pages (shared with the El Camino) give it for the coupe, not the SS; the 1987 page prints the coupe's weight line with no remark beside the El Camino's, and the SS guides offer 55/45 trims from 1986; 1986 is left out: the 1986 weight page (p.81) prints its model year as '-986'; the 1988 form covers the Monte Carlo alone
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.76.
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.71.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.88.
GM Heritage factory kit — 1988 Chevrolet Monte Carlo, p.79.
Factory-verified
AR9 Seats, front bucket, with driver and passenger recliners 1984–1985, 1987–1988
weight pages only: the 1984, 1985 and 1987 pages (shared with the El Camino) list it for all models; 1986 is left out: the 1986 weight page (p.81) prints its model year as '-986'; the 1988 line has no remark; the guides sell bucket seats as the cloth bucket trims
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.76.
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.71.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.88.
GM Heritage factory kit — 1988 Chevrolet Monte Carlo, p.79.
Factory-verified
AU3 Locks, power door 1983–1988
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.32.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.38.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.40.
GM Heritage factory kit — 1988 Chevrolet Monte Carlo, p.34.
Factory-verified
A01 Glass, tinted, all windows 1983–1987
some kit pages print AO1; 1988: tinted glass became standard (1988 kit pp.7, 29)
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.38.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.44.
Factory-verified
A31 Windows, power 1983–1987
1988: the guide lists power windows only inside the option packages, with no code, and the 1988 weight page prints the code illegibly
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.71.
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.32.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.40.
Factory-verified
A90 Trunk lid release, power 1983–1988
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.32.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.40.
GM Heritage factory kit — 1988 Chevrolet Monte Carlo, p.70.
Factory-verified
BW2 Molding, body side, deluxe 1983–1986
bright with a black vinyl insert; not on the SS; 1987 is left out: the 1987 guide prints the code only run into its quick-spec mark (BW2x), the price page prints none and the weight page prints BHZ; 1988 is left out: the guide lists the molding only inside the option packages and the 1988 weight page prints BWZ; the 1987 brochure pages (pp.11, 24, 34) and the 1988 brochure page (p.25) print BW2, but brochure pages print no model year
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.35.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.39.
Factory-verified
B32 Floor mats, front, color-keyed 1985
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.32.
Factory-verified
B33 Floor mats, rear, color-keyed 1985
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.30.
Factory-verified
B34 Floor mats, front, carpet insert, color-keyed 1986–1987
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.38.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.88.
Factory-verified
B35 Floor mats, rear, carpet insert, color-keyed 1986–1987
1986 is cited from the LS dealer order guide (p.34), which prints B35 under floor covering (the base guide's option line prints 335 and the price page 835)
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.34.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.40.
Factory-verified
B37 Floor mats, front and rear, color-keyed 1984
1983 is left out: the 1983 guide and price pages print 837; the 1985 weight page still lists it, but the 1985 guide sells B32 and B33 instead
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.38.
Factory-verified
B85 Molding, side window sill 1983–1987
not on the SS
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.34.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.47.
Factory-verified
B93 Door edge guards 1983–1985, 1987
1986 is left out: the 1986 guide and price pages print 893, and the weight page that prints B93 (p.82) has no model-year field
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.71.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.88.
Factory-verified
CC1 Roof panels, removable glass 1983–1988
1983–1984: not on the SS; the weight pages of the 1985–1987 kits still exclude the SS, but the SS order-guide pages offer the roof panels (1985 p.32, 1986 p.36, 1987 p.42 and the Aero Coupe's p.44), with the code not legible on those pages; 1988: not on the SS (weight page p.79, which prints the code illegibly, marks it not available on the SS, and the SS guide p.36 omits it); locks included from 1987
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.39.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.40.
GM Heritage factory kit — 1988 Chevrolet Monte Carlo, p.34.
Factory-verified
CD4 Windshield wipers, intermittent 1983–1987
1988 not claimed: the order guide lists intermittent wipers only inside the option packages' contents, although the 1988 weight page lists CD4 (owner ruling 2026-10-29); 1985 rests on the guide's quick-spec row (item, code and x marks), as the option line prints no code and the price page that prints CD4 (p.27) has no model-year field
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.32.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.40.
Factory-verified
C04 Roof cover, padded landau vinyl 1984, 1987
weight pages: Monte Carlo coupe, not the SS; the 1987 page prints CO4; the guides order it through the vinyl roof selector, the 1985 weight page's code is unreadable, and 1986 is left out because the 1986 weight page that prints C04 (p.82) has no model-year field
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.77.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.88.
Factory-verified
C49 Defogger, rear window, electric 1983–1988
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.42.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.88.
GM Heritage factory kit — 1988 Chevrolet Monte Carlo, p.34.
Factory-verified
C60 Air conditioning 1983–1988
includes increased cooling (1983–1987 price pages); 1986 is cited from the LS dealer order guide (p.34), which prints C60 beside air conditioning (the base guide's option line prints СБО and the price pages C6О and C8O)
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.26.
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.34.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.42.
GM Heritage factory kit — 1988 Chevrolet Monte Carlo, p.34.
Factory-verified
D34 Mirror, visor vanity, right-hand 1986–1987
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.34.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.42.
Factory-verified
D35 Mirrors, sport, left-hand remote, right-hand manual 1983–1987
standard on the SS; 1985 rests on the guide's quick-spec row (item, code and x marks), as the option line prints no code and no dated price or weight page prints D35
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.39.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.47.
Factory-verified
D55 Console, floor 1984–1987
requires bucket seats; 1985 rests on the guide's quick-spec row (item, code and x marks), as the option line prints 055 and the weight page that prints D55 (p.72) has no readable model year
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.38.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.89.
Factory-verified
D64 Mirror, visor vanity, right-hand, illuminated 1986–1988
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.34.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.42.
GM Heritage factory kit — 1988 Chevrolet Monte Carlo, p.34.
Factory-verified
D68 Mirrors, sport, twin remote 1983–1987
1988 not claimed: the order guide lists twin remote sport mirrors only inside the option packages' contents, although the 1988 weight page lists D68 (owner ruling 2026-10-29); 1985 rests on the guide's quick-spec row (item, code and x marks), as the option line prints no code and no dated price or weight page prints D68
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.39.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.89.
Factory-verified
D84 Paint, custom two-tone 1983–1988
includes color-keyed pin striping; not on the SS; 1985 and 1987 from the two-tone chart headings, as those guides' paint lines print no legible code
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.29.
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.32.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.39.
GM Heritage factory kit — 1988 Chevrolet Monte Carlo, p.34.
Factory-verified
D85 Striping, pin, body 1983–1988
not on the SS; not ordered with D84, whose custom two-tone includes pin striping; 1988 from the stripe chart heading, as the guide's pin-striping line prints no legible code
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.34.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.40.
GM Heritage factory kit — 1988 Chevrolet Monte Carlo, p.37.
Factory-verified
F40 Suspension, heavy duty, front and rear 1983–1984
not with F41 (1984); the 1985–1988 guides do not offer it
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.35.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
Factory-verified
F41 Suspension, sport 1983–1988
standard on the SS, which pairs it with P215/65R15 white-lettered tires; regular coupe: 1983, the brochure gives the sport suspension as needing P205/70 tires and the MVMA page (p.62) gives the P205/70R14 tire as requiring F41; 1984–1988, F41 requires QHY; 1984: not with LF9; 1988 from the MVMA suspension page, as the guide runs the code into its text
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.35.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.32.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.40.
GM Heritage factory kit — 1988 Chevrolet Monte Carlo, p.63.
Factory-verified
K05 Heater, engine block 1983–1988
included with V10 (1983–1984); some kit pages print KO5
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.37.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.32.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.42.
GM Heritage factory kit — 1988 Chevrolet Monte Carlo, p.79.
Factory-verified
K34 Cruise control, electronic, with resume 1984–1987
1988 not claimed: the order guide lists electronic speed control only inside the option packages' contents, although the 1988 weight page lists K34 (owner ruling 2026-10-29)
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.32.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.40.
Factory-verified
K35 Cruise control, automatic, with resume 1983
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.30.
Factory-verified
N18 Wheel cover locking package 1983–1984
requires N95; the weight pages of the 1985–1987 kits still list it, but the guides from 1985 sell locking wire covers as N91
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
Factory-verified
N33 Steering wheel, tilt, Comfortilt 1983–1987
1988: the guide lists it only inside the option packages, with no code, and the 1988 weight page has no entry
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.32.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.40.
Factory-verified
N90 Wheels, aluminum 1983–1986
1983–1984: an option, not on the SS; 1985: the weight page lists it with no remark and the brochure option list (p.17) prints N90, while the brochure wheel pages (pp.11, 25) call the optional aluminum wheel PD7; 1986 weight page: standard on the SS; the 1986 guide sells the coupe's optional cast aluminum wheel as PD7; 1987 is left out: only the 1987 weight page p.90 prints N90 (standard on the SS), and its model-year field is blank
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.74.
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.84.
Factory-verified
N91 Wheel covers, wire, with locks 1985–1988
not on the SS; 1987 rests on the guide's quick-spec row (item, code and x marks), as the option line prints no code and no dated price or weight page prints N91
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.34.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.40.
GM Heritage factory kit — 1988 Chevrolet Monte Carlo, p.34.
Factory-verified
N95 Wheel covers, wire 1983–1984
not on the SS; the 1985 brochure pages still print it, but the 1985 guide sells locking wire covers as N91
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
Factory-verified
PD7 Wheels, aluminum, cast 1986, 1988
not on the SS; the 1985 brochure pages also print PD7, but the 1985 weight page lists aluminum wheels as N90; 1987 is left out: the 1987 guide and price pages print no code for the aluminum wheels, the brochure pages (pp.11, 12, 35) print PD7 but no model year, and the 1987 weight page p.90 (model-year field blank) gives N90 as the SS's standard wheel and prints the coupe's cast aluminum wheel as POZ
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.34.
GM Heritage factory kit — 1988 Chevrolet Monte Carlo, p.34.
Factory-verified
QHY Tire, P205/70R14, all season, steel belted radial, white stripe 1984–1988
regular coupe only (the SS has P215/65R15 tires); requires F41
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.32.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.40.
GM Heritage factory kit — 1988 Chevrolet Monte Carlo, p.34.
Factory-verified
QMW Tire, P195/75R14, all season, steel belted radial, blackwall 1984, 1986–1988
standard except on the SS; the 1985 guide and price pages print OMW and aMW
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.32.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.40.
GM Heritage factory kit — 1988 Chevrolet Monte Carlo, p.34.
Factory-verified
QMX Tire, P195/75R14, all season, steel belted radial, white stripe 1984–1988
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.32.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.40.
GM Heritage factory kit — 1988 Chevrolet Monte Carlo, p.34.
Factory-verified
QVU Tire, P205/70R14, steel belted radial, white stripe 1983
regular coupe only (the SS has P215/65R15 tires); the 1983 MVMA page (p.62) gives the P205/70R14 tire as requiring F41
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.35.
Factory-verified
QXV Tire, P195/75R14, steel belted radial, blackwall 1983
standard
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.35.
Factory-verified
TR9 Lighting, auxiliary 1983–1987
luggage compartment and underhood lamps and a headlamp-on reminder; 1987: also a dome reading lamp, without CC1 roof panels (price page); 1985 rests on the guide's quick-spec row (item, code and x marks), as the option line's code is unreadable and the price page that prints TR9 (p.27) has no model-year field
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.39.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.40.
Factory-verified
TT4 Headlamps, halogen, high and low beam 1985–1987
standard on the LS coupe (1986–1987)
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.32.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.42.
Factory-verified
TT5 Headlamps, halogen, high beam 1983–1984
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.35.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
Factory-verified
T87 Lamps, cornering 1983–1985
not on the SS
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.74.
Factory-verified
UA1 Battery, heavy duty 1983–1988
not with the LB4 (1988 guide); the 1986–1987 brochures say V8 only, but the weight pages of the 1986–1987 kits still list an LB4 weight
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.32.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.32.
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.32.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.46.
GM Heritage factory kit — 1988 Chevrolet Monte Carlo, p.34.
Factory-verified
UF7 Gauge package with trip odometer 1983–1985
clock, voltmeter, temperature and oil pressure gauges; 1984: not with LF9
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.37.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.30.
Factory-verified
U39 Gauge package with trip odometer 1986–1987
voltmeter, temperature and oil pressure gauges; standard on the SS; 1988 is left out: the guide lists the gauge package only inside package 3, and only the brochure page (p.14, the LS's optional gauge package) prints U39, while brochure pages print no model year
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.32.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.40.
Factory-verified
U16 Tachometer 1986–1988
on the regular and LS coupe requires the gauge package (U39; package MLA3 in 1988); included with the SS
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.32.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.40.
GM Heritage factory kit — 1988 Chevrolet Monte Carlo, p.34.
Factory-verified
U35 Clock, quartz electric 1983–1985
included with UF7
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.34.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.30.
Factory-verified
U63 Radio, AM 1983–1985, 1987
an option in 1983–1984; the 1987 weight page gives it as base equipment; the 1986 page prints 063
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.74.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.87.
Factory-verified
U69 Radio, AM/FM 1983–1985
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.30.
Factory-verified
U58 Radio, AM/FM stereo 1983–1985
includes dual rear speakers
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.30.
Factory-verified
UN3 Radio, AM/FM stereo, cassette tape 1983–1985
includes dual rear speakers
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.30.
Factory-verified
UL5 Radio delete 1985–1988
a credit option
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.32.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.40.
GM Heritage factory kit — 1988 Chevrolet Monte Carlo, p.34.
Factory-verified
UL6 Radio, AM, digital clock 1986–1987
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.32.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.40.
Factory-verified
UK4 Radio, AM/FM stereo, electronically tuned, seek and scan 1986–1987
includes dual rear speakers
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.32.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.40.
Factory-verified
UM7 Radio, AM/FM stereo, electronically tuned, seek and scan, digital clock 1986–1987
includes dual rear speakers
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.32.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.40.
Factory-verified
UM6 Radio, AM/FM stereo, electronically tuned, seek and scan, cassette tape, digital clock 1986–1987
1988 is left out: the 1988 guide prints UM&, and only the brochure page (p.16) prints UM6, while brochure pages print no model year
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.32.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.40.
Factory-verified
UX1 Radio, AM stereo and FM stereo, electronically tuned, seek and scan, cassette tape with search and repeat, graphic equalizer, digital clock 1986–1988
includes U66 (1986–1987); 1988: with the extended range sound system
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.32.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.40.
GM Heritage factory kit — 1988 Chevrolet Monte Carlo, p.36.
Factory-verified
U64 Speakers, dual rear 1985
included with the stereo radios; 1986–1987 not claimed: the 1986–1987 guides include rear speakers only with the stereos and sell U66, although the weight pages list U64 (owner ruling 2026-10-29)
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.30.
Factory-verified
U66 Speakers, premium, dual rear 1986–1987
included with UX1
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.32.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.40.
Factory-verified
U81 Speakers, dual rear 1983–1984
with U63 or U69; included with U58 and UN3
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
Factory-verified
U73 Antenna, fixed mast 1983–1984
included with the radio, except on the SS, which has the black US6 antenna
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
Factory-verified
US6 Antenna, fixed mast, black 1983–1984
only in: SS
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.37.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.38.
Factory-verified
U75 Antenna, power 1983–1988
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.32.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.40.
GM Heritage factory kit — 1988 Chevrolet Monte Carlo, p.34.
Factory-verified
V08 Cooling, heavy duty 1983, 1985–1986, 1988
some kit pages print VO8; the weight pages of the 1984–1986 kits give it with the V8s, including the SS's L69, and the 1985–1986 pages exclude the SS only on the V6 line, but the SS guide pages do not offer it; 1984 is left out: the 1984 guide prints no V08 line, and the 1984 MVMA pages that print it (pp.47, 48, 80) have a blank or garbled model-year field; 1987 is left out: the 1987 price and weight pages print VOB, the guide's line prints no code, and only the brochure option page (p.11) prints V08, while brochure pages print no model year
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.36.
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.32.
GM Heritage factory kit — 1988 Chevrolet Monte Carlo, p.34.
Factory-verified
VK3 License plate bracket, front 1988
1987 is left out: only the 1987 option index prints VK3, and the 1987 guide prints YK3
GM Heritage factory kit — 1988 Chevrolet Monte Carlo, p.34.
Factory-verified
ZJ7 Wheels, Rally, styled, with special hub caps and trim rings 1983–1988
the 1983 SS guide page lists special Rally wheels, and the 1984–1985 brochure option lists (1984 p.17, 1985 p.17) give Rally wheels as standard on the SS, but the weight page in the 1984 kit (p.80, model-year field blank) marks them not available on the SS; 1985 from the MVMA tire and wheel page; 1987 rests on the guide's quick-spec row (item, code and x marks), as the option line prints 2J7, the weight page prints 2J7 and only the brochure page (p.12, no model year) prints ZJ7
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.56.
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.32.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.40.
GM Heritage factory kit — 1988 Chevrolet Monte Carlo, p.34.
Factory-verified
Paint
15M Accent color, Medium Gray Metallic 1985
with D84 custom two-tone, whose chart requires an accent color; the code is the paint color number plus M
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.29.
Factory-verified
17M Accent color, Bright Silver Metallic 1984
with D84 custom two-tone, whose chart requires an accent color; the code is the paint color number plus M; the 1984 summary gives Bright Silver Metallic as paint code 17
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.35.
Factory-verified
27M Accent color, Dark Blue Metallic 1983–1984
with D84 custom two-tone, whose chart requires an accent color; the code is the paint color number plus M
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.29.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.35.
Factory-verified
31M Accent color, Dark Blue Metallic 1985
with D84 custom two-tone, whose chart requires an accent color; the code is the paint color number plus M
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.29.
Factory-verified
43M Accent color, Light Green Metallic 1985
with D84 custom two-tone, whose chart requires an accent color; the code is the paint color number plus M
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.29.
Factory-verified
48M Accent color, Dark Fern Metallic 1984
with D84 custom two-tone, whose chart requires an accent color; the code is the paint color number plus M; 1983 is left out: the 1983 two-tone chart prints 480
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.35.
Factory-verified
58M Accent color, Light Brown Metallic 1985
with D84 custom two-tone, whose chart requires an accent color; the code is the paint color number plus M
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.29.
Factory-verified
67M Accent color, Dark Brown Metallic 1984
with D84 custom two-tone, whose chart requires an accent color; the code is the paint color number plus M; 1983 is left out: only the 1983 option index prints 67M
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.35.
Factory-verified
78M Accent color, Maroon Metallic 1983–1984
with D84 custom two-tone, whose chart requires an accent color; the code is the paint color number plus M; the 1984 index names it Dark Maroon Metallic
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.29.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.35.
Factory-verified
79M Accent color, Dark Maroon Metallic 1985
with D84 custom two-tone, whose chart requires an accent color; the code is the paint color number plus M
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.29.
Factory-verified
Internal / Process
NA5 internal Emission system, federal 1983–1984, 1986, 1988
1985 and 1987 are left out: those guides print NAS
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.34.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.34.
GM Heritage factory kit — 1988 Chevrolet Monte Carlo, p.34.
Factory-verified
NA6 internal Emission system, high altitude 1983–1984
1983: named in a power-team chart heading, which counts as the code's printing, as the own-entry lines print NAG, NAB and NAE
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.29.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
Factory-verified
YF5 internal Emission system, California 1983–1988
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.32.
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.34.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.44.
GM Heritage factory kit — 1988 Chevrolet Monte Carlo, p.34.
Factory-verified
D60 internal Paint, non-recommended color combination authorization 1983–1988
order code that confirms a paint, trim or vinyl roof combination outside the charts
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.29.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.35.
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.29.
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.31.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.39.
GM Heritage factory kit — 1988 Chevrolet Monte Carlo, p.33.
Factory-verified
B3W internal Price information, preliminary 1983–1987
only the tentative 1988 price page prints it, so 1988 is not claimed
GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.32.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.47.
Factory-verified

Source document: chevrolet/monte-carlo-gen4.md. Rows marked — record an option the factory offered whose RPO code is not documented in the consulted sources.