Engine Identification
Engine code letters are suffix of Engine Identification Number. Number is stamped in pad on front right side of cylinder block.
Chevrolet & GMC
| Application |
Code |
| 454" Man. Trans. |
| |
Calif. |
TRY, TRM |
| Federal |
TSF |
| 454" Auto. Trans. |
| |
Calif. |
TRF, TRL, TSS, TSB, TRJ |
| Federal |
TRH, TSH, TSJ, TST |