Reference Details
- Common issue
- Base 455 TR engine or non-matching engine serial represented as original Stage 1
- Confidence
- documented
- Correct value
- TS production code for 1971 GS Stage 1 455; 1971 Buick engine-number guidance states Buick engines also carry an engine serial number matching the VIN
- Where to check
- 455 CID V8 engine number is between the two front spark plugs and exhaust manifold; production code is between the two rear spark plugs and left exhaust manifold
