Reference Details
- Common issue
- Skylark or GS 340 body presented as GS 400 without VIN/body evidence.
- Confidence
- documented
- Correct value
- VIN decoding must indicate GS 400 series and correct two-door body style before trim claims are accepted.
- Where to check
- VIN plate on left front door hinge pillar; Team Buick also notes engine-block stamping.