General Motors option code
A1
A1: a General Motors factory option code reused for more than one part across 1969–1974 and 2 models — see the table for what it named each year, with installs and price where a source states them.
General Motors reused this code for more than one part over the years — read the "as named that year" column for what it meant on each row rather than assuming one meaning throughout.
2 models · 3 model years · 2 sources
Every sourced appearance
| Year | Model | As named that year | Price | Installs |
|---|---|---|---|---|
| 1969 | Buick Skylark Gran Sport, GS and GSX | Stage 1 high-performance 400 cu in modified V-8 with specific ornamentation, Positive Traction, performance axle, heavy-duty cooling and low-restriction dual exhaust (GS 400) order code | $199.05 | Unknown |
| 1973 | Buick Riviera | Stage I Option - High performance 455 cu. in. 4 bbl. V-8 engine. Matched "THM 400" Performance axle with positive traction. chrome plated air cleaner. Stage I name plate on grill. order code (Buick option code) | $139 | 1,234 Reported |
| 1974 | Buick Riviera | Stage I Performance Package - High Performance 455 cu. in. 4 bbl. V-8 engine; matched "THM-400" transmission; Performance axle w/positive traction; chrome plated air cleaner; Stage I name plate on grill; High energy ignition system. order code (Buick option code) | $148 | 1,698 Reported |
Every row traces to the source it links from on that model's own year page; this table only collects them in one place.