GM Regular Production Options · 1960–2027
Every option,
graded and sourced.
The most accurate, best-sourced reference to GM RPO codes. Not another scraped list — every code here carries a confidence grade and, where a factory document confirms it, a citation to the exact GM factory document and page.
- ✓ Factory-verified · 66,340
- ● Confirmed · 2,739
- ◑ Single-source · 2,183
- ⚠ Disputed · 116
194,936 factory citations across 504 GM Heritage kits and 1087 other GM documents back 71,378 option rows on 355 models.
Why this exists
Provenance, not repetition
Most RPO lists copy each other, errors and all. This one is rebuilt from GM Heritage factory documentation and adversarially cross-checked. Each code shows its evidence.
Graded confidence
Four honest tiers — factory-verified, confirmed, single-source, disputed. Disputed codes show both readings; we never silently pick a winner.
A navigable graph
Every code links to every model and year it appears on, and back again. Look up a car, or chase a single option across the whole era.
