General Motors Engine Codes: BUICK
| Engine | Code |
|---|---|
| 151" 4 Cyl. (VIN 5) | Y4, Y6, Y9, A3, AU, AS, AT |
| 173" V6 (VIN 7) | CNJ, CNF, CNW, CSB, CNX, CNL, CSC |
| 231" V6 (VIN A) | EX, EY, EZ, EL, OA, OB, OC, EN, OX, OY, ED, EP, EA, EB, EK, OW, EC, EM, OV |
| 231" V6 (VIN 3) | EU, EW, ER, EE, OS, EH, EJ |
| 252" V6 (VIN 4) | MF |
| 265" V8 (VIN S) | XH, XR |
| 301" V8 (VIN W) | XT, XW, X3 |
| 350" V8 (VIN R) | UAF, UAD, UAS, UAT |
| 350" V8 (VIN X) | MB, MU, MT |
| 350" V8 (VIN N) | VCD, VBN, VBT, VBM, VBS, VBU, VCH |