Model Identification
NOTE:
The following conditions must be met before testing: Engine at operating temperature, Engine in closed loop operation, Engine idling ("Engine Run" column), Test terminal NOT grounded, and Scanner or ALDL tool NOT installed.
Repair procedures in this article are sometimes identified by a specific body code. The following table lists GM division, model name, and body types that apply to the body codes.
MODEL IDENTIFICATION & ENGINE APPLICATIONS
| Body & GM Division | Model Name | Engine, FUEL (VIN) | |
|---|---|---|---|
| "A" Body | |||
| Buick | Century | 2.5L 4-Cyl. TBI (R) | |
| Buick | Century | 2.8L V6 MFI (W) | |
| Buick | Century | 3.8L V6 SFI (3) | |
| Chevrolet | Celebrity | 2.5L 4-Cyl. TBI (R) | |
| Chevrolet | Celebrity | 2.8L V6 MFI (W) | |
| Oldsmobile | Cutlass Ciera | 2.8L V6 MFI (W) | |
| Oldsmobile | Cutlass Ciera | 3.8L V6 SFI (3) | |
| Oldsmobile | Cutlass Cruiser | 2.8L V6 MFI (W) | |
| Oldsmobile | Cutlass Cruiser | 3.8L V6 SFI (3) | |
| Pontiac | 6000 | 2.5L 4-Cyl. TBI (R) | |
| Pontiac | 6000 | 2.8L V6 MFI (W) | |
| Pontiac | 6000 | 3.1L V6 MFI (T) | |
| "J" Body | |||
| Buick | Skyhawk | 2.0L 4-Cyl. TBI (1) | |
| Buick | Skyhawk | 2.0L 4-Cyl. TBI (K) | |
| Cadillac | Cimarron | 2.8L V6 MFI (W) | |
| Chevrolet | Cavalier | 2.0L 4-Cyl. TBI (1) | |
| Chevrolet | Cavalier | 2.8L V6 MFI (W) | |
| Oldsmobile | Firenza | 2.0L 4-Cyl. TBI (1) | |
| Oldsmobile | Firenza | 2.0L 4-Cyl. TBI (K) | |
| Pontiac | Sunbird | 2.0L 4-Cyl. TBI (K) | |
| Pontiac | Sunbird | 2.0L 4-Cyl. MFI (M) | |
| "N" Body | |||
| Buick | Skylark | 2.3L 4-Cyl. MFI (D) | |
| Buick | Skylark | 2.5L 4-Cyl. TBI (U) | |
| Buick | Skylark | 3.0L V6 MFI (L) | |
| Buick | Skylark Somerset | 2.0L 4-Cyl. TBI (K) | |
| Buick | Skylark Somerset | 2.5L 4-Cyl. TBI (U) | |
| Buick | Skylark Somerset | 3.0L V6 MFI (L) | |
| Buick | Somerset Regal | 2.0L 4-Cyl. TBI (K) | |
| Buick | Somerset Regal | 2.5L 4-Cyl. TBI (U) | |
| Buick | Somerset Regal | 3.0L V6 MFI (L) | |
| Oldsmobile | Cutlass Calais | 2.3L 4-Cyl. MFI (D) | |
| Oldsmobile | Cutlass Calais | 2.5L 4-Cyl. TBI (U) | |
| Oldsmobile | Cutlass Calais | 3.0L V6 MFI (L) | |
| Pontiac | Grand Am | 2.0L 4-Cyl. MFI (M) | |
| Pontiac | Grand Am | 2.3L 4-Cyl. MFI (D) | |
| Pontiac | Grand Am | 2.5L 4-Cyl. TBI (U) | |
| "P" Body | |||
| Pontiac | Fiero | 2.5L 4-Cyl. TBI (R) | |
| Pontiac | Fiero | 2.8L V6 MFI (9) | |