General Motors option code
H4
H4: a General Motors factory option code reused for more than one part across 1969–1976 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 · 4 model years · 3 sources
Every sourced appearance
| Year | Model | As named that year | Price | Installs |
|---|---|---|---|---|
| 1969 | Buick Skylark Gran Sport, GS and GSX | Rallye Road Control package: 15:1 power steering, rear stabilizer bar, heavy-duty shocks and wheels, rear lower control arms, firm rear springs on GS 400 (GS 350, GS 400) order code | $131.65 | Unknown |
| 1972 | Buick Riviera | Maintenance Free Battery order code (Buick option code) | Unknown | Unknown |
| 1973 | Buick Riviera | Roadability Suspension Package (F9 required) (N.A. with A9) order code (Buick option code) | $0 | Unknown |
| 1976 | Buick Riviera | Rally Ride & Handling order code (Buick option code) | $34 | Unknown |
Every row traces to the source it links from on that model's own year page; this table only collects them in one place.