General Motors option code
M1 — Engine Block Heater
M1 (Engine Block Heater): a General Motors factory option code recorded on 1 model across 1973–1976, with installs and price where a source states them.
1 model · 4 model years · 4 sources
Every sourced appearance
| Year | Model | As named that year | Price | Installs |
|---|---|---|---|---|
| 1973 | Buick Riviera | Engine Block Heater order code (Buick option code) | $5 | Unknown |
| 1974 | Buick Riviera | Engine Block Heater order code (Buick option code) | $5 | Unknown |
| 1975 | Buick Riviera | Engine Block Heater order code (Buick option code) | $5 | Unknown |
| 1976 | Buick Riviera | Engine Block Heater order code (Buick option code) | $12 | 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.