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.
Transmission ID and VIN Derivative Location
| Callout | Component Name |
|---|---|
| 1 | Goodwrench® Tag Location |
| 2 | Year |
| 3 | Not Used |
| 4 | Remanufacturing Site Code |
| 5 | Serial Number |
| 6 | Julian Date |
| 7 | Year Remanufactured |
| 8 | Model |
| 9 | Transmission Identification Plate Location |
| 10 | Model Year |
| 11 | Line Build |
| 12 | GM Production Code |
| 13 | Julian Date |
| 14 | Shift |
| 15 | Model |
| 16 | Serial Number in Base Code 31 |
| 17 | W = Warren Assembly Plant |
| 18 | 4T65-E |
| 19 | Model |
| 20 | Vehicle Identification Number (VIN) Derivative Stamping Location |
All automatic transmissions have a metal identification (ID) nameplate (9) attached to the case exterior.
The primary (1) and secondary (2) Manual Tooling VIN Derivative Locations are on the casting of the transmission housing.
The location for the Semi-Automatic VIN derivative (1) is on the transmission housing.
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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.