Buick · 1983-1985
Skylark — X-body (1983–1985)
skylark · skylark custom · skylark limited · skylark sport · skylark t-type
5 option rows 5 RPO codes 3 model years
60% Factory-verified
- ✓ Factory-verified · 3
- ● Confirmed · 0
- ◑ Single-source · 2
- ⚠ Disputed · 0
Applicable options
Documented RPO codes
Model year
| Code | Option | Years | Notes & factory source | Confidence |
|---|---|---|---|---|
| Engines | ||||
| LR8 | Engine, 2.5 L (151 cu in) L4, throttle-body fuel injection | 1983–1985 | the standard four-cylinder; Wikipedia's Skylark article names LR8 in its fifth-generation infobox and gives the Iron Duke four to 1985; gnttype.org's 1984 Buick VIN table prints it for the Skylark (VIN R), a second source (owner ruling, 2026-11-05: a T3 page that names the code for the nameplate, with Wikipedia dating every year); shared X-body code; cited from the Chevrolet Citation kit, whose engine pages print it with its model year GM Heritage factory kit — 1983 Chevrolet Citation, p.10. GM Heritage factory kit — 1984 Chevrolet Citation, p.10. GM Heritage factory kit — 1985 Chevrolet Citation, p.7. | Factory-verified |
| LE2 | Engine, 2.8 L (173 cu in) V6, 2-barrel carburetor | 1983–1985 | the optional V6; Wikipedia's Skylark article names LE2 in its infobox and gives it to 1985; gnttype.org's 1984 Buick VIN table prints it for the Skylark (VIN X), a second source (owner ruling, 2026-11-05: a T3 page that names the code for the nameplate, with Wikipedia dating every year); shared X-body code; cited from the Chevrolet Citation kit GM Heritage factory kit — 1983 Chevrolet Citation, p.10. GM Heritage factory kit — 1984 Chevrolet Citation, p.10. GM Heritage factory kit — 1985 Chevrolet Citation, p.7. | Factory-verified |
| LH7 | Engine, 2.8 L (173 cu in) V6, high output, 2-barrel carburetor | 1983–1984 | the T-Type's standard engine in Wikipedia's Skylark article; Wikipedia names LH7 in its infobox; gnttype.org's 1984 Buick VIN table prints it for the Skylark (VIN Z), a second source (owner ruling, 2026-11-05: a T3 page that names the code for the nameplate, with Wikipedia dating every year); 1985 is left out of the Years because the Citation kit's 1985 engine page lists the multiport-injected LB6 in its place, although Wikipedia's engine list runs LH7 to 1985 (see gaps); shared X-body code; cited from the Chevrolet Citation kit GM Heritage factory kit — 1983 Chevrolet Citation, p.10. GM Heritage factory kit — 1984 Chevrolet Citation, p.10. | Factory-verified |
| Transmissions | ||||
| MD9 | Automatic transaxle, 3 speed (THM 125) | 1984–1985 | GM engineering code behind the MX1 merchandising option; matched to the Skylark's unit by meaning: Wikipedia's Skylark article names the 3 speed Turbo-Hydramatic 125 automatic in its infobox but prints no code; the Citation kit's automatic-transmission weight line for the 2.5 L engine reads "Merchandising Option for MD9, MX1"; 1983 is left out because no listed kit page heads the code that year; shared X-body code; cited from the Chevrolet Citation kit GM Heritage factory kit — 1984 Chevrolet Citation, p.34. GM Heritage factory kit — 1985 Chevrolet Citation, p.33. | Single-source |
| MX1 | Automatic transmission, 3 speed (merchandising code for the THM 125) | 1984–1985 | matched to the unit by meaning: Wikipedia's Skylark article names the 3 speed Turbo-Hydramatic 125 automatic in its infobox but prints no code; the pages print MXI (letter I); 1983 is left out because no listed kit page heads the code that year; shared X-body code; cited from the Chevrolet Citation kit GM Heritage factory kit — 1984 Chevrolet Citation, p.34. GM Heritage factory kit — 1985 Chevrolet Citation, p.33. | Single-source |
Source document: buick/skylark-x-body.md. Rows marked — record an option the factory offered whose RPO code is not documented in the consulted sources.