AS3 ● Confirmed

Chevrolet · Regular Production Option

Crew cab equipment (73–87 list); "rear seat, Suburban/utility" in GM lists

Years 1967–82 Models 1

Also described as Rear seat

Documented applications

C/K Trucks →

• 1967–72 ● Confirmed

  Suburban, Blazer; code reused 1973+ for crew-cab equipment

• 1973–82 ⚠ Disputed

  Reused code — see 67–72

This page aggregates every documented appearance of AS3 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.