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docs/rpo/buick/fullsize.md

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Rendered verbatim from the reference. Factory citations shown as ⛭ GM Heritage — …. For filtering, badges, and crosslinks, use the interactive Full-Size — LeSabre / Electra / Wildcat page.

Buick Full-Size — LeSabre / Wildcat / Electra / Estate Wagon (1960–1982)

Covers LeSabre (1959-on), Invicta (1959–63), Wildcat (1962–70), Centurion (1971–73), Electra 225 (1959-on), Estate Wagon, and the 1978–79 LeSabre Sport Coupe turbo.

Code systems: the 1970 factory option sheet below uses Buick dealer ordering codes; build sheets and post-1972 documentation use corporate RPO codes. See division README.

Years 1960–1969 {#year-1960}

No machine-readable factory option-code sheets for 1960–69 full-size Buicks were located online — coverage gap. Narrative points (confirmed at model level): Wildcat carried the performance image (401/425 "nailhead" V8s); the 425 Super Wildcat dual-quad (dealer code A8 on 1965 Riviera sheet, RPO Y48 in 1964) was also available in full-size cars; a Wildcat Gran Sport package appeared in 1966 (performance axle, dual-quad 425) — its ordering code was not verified (commonly reported as the GS/A9 family; treat as unverified).

Year 1970 {#year-1970}

From the factory 1970 "Regular Size" option sheet (TeamBuick transcription) — dealer ordering codes, applying to LeSabre / LeSabre Custom / LeSabre 455 / Estate Wagon / Wildcat Custom / Electra 225 / Electra 225 Custom / Riviera:

Code Description Years Models/Notes Confidence
A7 High Performance 350 cid 4-bbl V8, regular fuel 1970 LeSabre confirmed
A8 High Performance Group: 350-4bbl, dual exhaust 1970 LeSabre confirmed
A9 Riviera GS option 1970 Riviera — see riviera.md confirmed
B2 Turbo Hydra-Matic 400 1970 Full-size confirmed
B4 Full-length console 1970 (bucket-seat cars) confirmed
B5 Turbo Hydra-Matic 350 1970 LeSabre confirmed
C1 Power disc brakes 1970 All full-size confirmed
C6 Power steering 1970 All full-size confirmed
C7 Power brakes 1970 All full-size confirmed
D1 / D4 / D5 Sonomatic AM / AM-FM stereo / AM-FM radio 1970 All full-size confirmed
D6 / D0 Rear speaker / stereo tape player 1970 All full-size confirmed
E1 Dual exhaust 1970 Full-size V8s confirmed
E5 Evaporative emission system (Calif.) 1970 All full-size confirmed
E9 Space Saver spare tire 1970 Full-size confirmed
F1 / F2 Whitewall / oversize whitewall J78-15 tires 1970 All full-size confirmed
F8 Wide Oval red line tires G70-15 1970 Full-size confirmed
F9 Wide Oval whitewall tires H70-15 1970 Full-size confirmed
G1 Performance axle with positive traction 1970 All full-size confirmed
G4 Positive traction differential 1970 All full-size confirmed
H1 Trailer towing option 1970 Full-size confirmed
H2 Ride and Handling option 1970 Full-size confirmed
H3 Automatic level control 1970 Full-size, wagons confirmed
H5 Heavy-duty Energizer (battery) 1970 Full-size confirmed
I-2 Comfort-Flo forced ventilation 1970 Full-size confirmed
I-5 Automatic Climate Control A/C 1970 Full-size, Riviera confirmed
I-6 Air conditioner, manual controls 1970 All full-size confirmed
I-7 Heavy-duty cooling 1970 All full-size confirmed
J1 / J3 / J5 Custom seat/shoulder belt packages 1970 All full-size confirmed
K2 Cornering lights 1970 Full-size, Riviera confirmed
K3 Speed alert and trip odometer 1970 Full-size confirmed
L1 / L2 Soft-Ray tinted glass / windshield 1970 All full-size confirmed
M7 / M8 / M9 Rear defroster / block heater / heated-glass defroster 1970 Full-size confirmed
N2 Four-note horn 1970 Full-size confirmed
N3 Heavy-duty air cleaner 1970 All full-size confirmed
O4 / O5 Door guards / remote mirror 1970 All full-size confirmed
O6 / Q6 Custom padded cushions 1970 Full-size (listed under two codes by series) confirmed
O7 Protection group 1970 Wagons confirmed
P1 / P2 Carpet savers & handy mats / carpet savers 1970 All full-size confirmed
Q4 / Q5 Power seat 6-way / 4-way 1970 Full-size confirmed
R1 Power windows 1970 Full-size confirmed
S6 / S7 Cruise Master / tilt steering wheel 1970 Full-size confirmed
T1 / T2 / T3 Electric trunk release / door locks / door & seat-back locks 1970 Full-size confirmed
U4 Accessory group 1970 Full-size confirmed
U7 Mirror map light 1970 Full-size confirmed
V1 / V2 / V3 / V4 Deluxe covers / chrome wheels / wire covers / Super Deluxe covers 1970 Full-size confirmed
W3 / W4 / W5 / W6 / W7 Molding packages (body side, rocker, window frame, quarter) 1970 Full-size by series confirmed
W9 Wood-grain applique 1970 Estate Wagon confirmed
X3 Rim-blower steering wheel 1970 Full-size confirmed
X4 Custom belt reveal moldings 1970 Full-size confirmed
Y2 / Y3 / Y4 / Y5 / Y6 Load-floor carpet / luggage rack / locker / rack w/ deflector / air deflector 1970 Estate Wagon confirmed
Z2 / Z4 Divided 2nd seat / power tailgate window 1970 Estate Wagon confirmed

Years 1971–1976 {#year-1971}

Centurion replaced Wildcat (1971–73); 455 available across the line. Corporate RPO codes (from the TeamBuick 1970–76 Buick list) applying to the big cars:

Code Description Years Models/Notes Confidence
L72 455 cid 2-bbl V8 1971–1976 LeSabre/Centurion/Estate single-source
M40 Turbo Hydra-Matic 400 1971–1976 Full-size confirmed
G80 Limited-slip differential 1971–1976 Full-size confirmed
GM8 / GU1 / GU2 / GU4 / GU5 / GU6 Axle ratios 2.56 / 2.41 / 2.73 / 3.08 / 3.23 / 3.42 1970–1976 All lines single-source
KF2 Wheel spin control (Max Trac) 1971–1974 Full-size, Riviera single-source
C61 / C60 Automatic / manual A/C 1971–1976 Full-size single-source
G67 / G66 Rear air-lift shocks, automatic / manual 1970–1976 Full-size, wagons single-source
N37 / N33 Tilt-telescope / tilt column 1971–1976 Full-size single-source
A31 / AU3 Power windows / electric door locks 1970–1976 Full-size single-source
B1Q Power tailgate lock 1971–1976 Estate Wagon single-source
B3X Estate equipment 1971–1976 Estate Wagon single-source
BO7 / BO2 Police / taxi special body packages 1970–1976 LeSabre single-source
K97 / K76 / K77 Delcotron 80A / 61A / 55A alternators 1970–1976 Full-size single-source

Years 1977–1982 {#year-1977}

Downsized B/C-body. Highlights:

Code Description Years Models/Notes Confidence
— (LeSabre Sport Coupe) 3.8L V6 turbo; with the Regal Sport Coupe, one of only two turbocharged US production cars at launch 1978–1979 LeSabre coupe confirmed
LC8 3.8L V6 turbo 4-bbl (RPO) 1978–1979 LeSabre Sport Coupe (attribution single-source) single-source
LD5 3.8L (231) V6 2-bbl 1977–1982 LeSabre confirmed
L34 / LM1 350 4-bbl V8 variants 1977–1979 LeSabre/Electra (Buick vs Chevy 350 sourcing varies) single-source
L80 403 cid 4-bbl V8 (Oldsmobile-built) 1977–1979 Electra, Estate Wagon single-source
F41 Firm ride/handling suspension 1977–1982 Full-size confirmed
G80 Limited-slip differential 1977–1982 Full-size confirmed

Year-by-year window-sticker RPO tables for 1977–82 full-size Buicks were not located — coverage gap.

Sources