Firing order: 1-8-4-3-6-5-7-2 (18436572).
Cylinder numbering: Left bank 1-3-5-7, right bank 2-4-6-8
| Engines | Oldsmobile 5.7 diesel LF9 and 4.3 diesel V8 |
| Years | 1978-1985 |
| Firing order | 1-8-4-3-6-5-7-2 |
| Cylinder numbering | Left bank 1-3-5-7, right bank 2-4-6-8 |