MODEL IDENTIFICATION
Vehicle model is identified by the fifth character of Vehicle Identification Number (VIN). VIN is stamped on metal pad on top of left end of instrument panel, near windshield. See MODEL IDENTIFICATION table.
| Series (1) | Model |
|---|---|
| "C" | 2WD Pickup, Sierra, Silverado, Suburban, Tahoe & Yukon |
| "G" | Cutaway, Express, RV Cutaway & Savana |
| "K" | 4WD Pickup, Sierra, Silverado, Suburban, Tahoe, Yukon & AWD Escalade |
| (1) Vehicle series is fifth character of VIN. | |
| (1) | Vehicle series is fifth character of VIN. |
MODEL IDENTIFICATION
DESCRIPTION
Vehicle Control Module (VCM) is equipped with a self-diagnostic system which detects system failures or abnormalities. When a malfunction occurs, VCM will store a DTC and, in most cases, illuminate the Malfunction Indicator Light (MIL) located on instrument cluster. Malfunctions are recorded as hard failures or intermittent failures.
There are 4 types of DTC categories
- Type "A" Emissions related. Illuminates MIL the first time DTC sets.
- Type "B" Emissions related. Illuminates MIL if fault is active for 2 consecutive driving cycles.
- Type "C" Non-emissions related. Does not illuminate MIL, but will illuminate SERVICE light.
- Type "D" Non-emissions related. Does not illuminate MIL or SERVICE light.