Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
VIN Derivative
All engines and transmissions are stamped or laser etched with a partial Vehicle Identification Number (VIN), which was derived from the complete VIN. A VIN derivative contains the following 9 positions:
| Position | Definition | Character | Description |
|---|---|---|---|
| 1 | GM Division Identifier | C H K N T |
Chevrolet Truck Oldsmobile MPV GMC MPV Chevrolet MPV GMC Truck |
| 2 | Model Year | 4 | 2004 |
| 3 | Assembly Plant | K 8 2 X |
Linden, NJ Shreveport, LA Moraine, OH E.E.M.S |
| 4-9 | Plant Sequence Number | - | Plant Sequence Number |
A VIN derivative can be used to determine if a vehicle contains the original engine or transmission, by matching the VIN derivative positions to their accompanying positions in the complete VIN:
| VIN Derivative Position | Equivalent VIN Position |
|---|---|
| 1 | 3 |
| 2 | 10 |
| 3 | 11 |
| 4-9 | 12-17 |
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.