Engine Identification
On all models except Cadillac, engine can be identified by a Code Tape containing engine code letters. The Code Tape is located directly above engine unit number on oil fill tube. On Cadillac (except Seville), unit number is located on block behind left cylinder head. On Seville, unit number is located on front left side of cylinder block. Engines are coded as follows:
| Application | Code | |
|---|---|---|
| Buick | ||
| 350" | TK, TL, TN, Q2, Q3, QL, QK, QP, QQ, Q6, Q7 | |
| 403" | UA, UB, U2, U3, VA, VB, VJ, VK | |
| Cadillac | ||
| 350" | 6 | |
| Oldsmobile | ||
| 260" | QC, QD, QS, QT, QE, QJ | |
| 350" | QK, QL, QN, QO, QP, QQ, Q2, Q3, Q6, Q7, TK, TL, TN, TO, TP, TQ | |
| 403" | UA, UB, UC, UD, UE, U2, U3, U6, VA, VB, VJ, VK, VE | |
| Pontiac | ||
| 350" | TL, TK, TN, TO, TX, TY, Q2, Q3, QP, QQ, Q6, Q7, Q8, Q9 | |
| 403" | UA, UB, U2, U3, VA, VB, VJ, VK | |