General Motors option code
Z4 — Astroroof - Gold
Z4 (Astroroof): a General Motors factory option code recorded on 2 models across 1963–1976, with installs and price where a source states them.
2 models · 3 model years · 3 sources
Every sourced appearance
| Year | Model | As named that year | Price | Installs |
|---|---|---|---|---|
| 1963 | Buick Wildcat | Automatic Trunk Release order code | Unknown | Unknown |
| 1975 | Buick Riviera | Astroroof - Gold order code (Buick option code) | $810 | Unknown |
| 1976 | Buick Riviera | Astroroof - Gold order code (Buick option code) | $891 | 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.