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.
Engine ID and VIN Derivative Location
| Callout | Component Name |
|---|---|
| 1 | Engine ID Number, Primary Location |
| 2 | Engine ID Number, Secondary Location |
The eighth digit of the vehicle identification number (VIN) is the engine code letter, which identifies the engine as a 5.7L V8 (VIN eighth digit: G) (RPO code LS1).
Stick-on labels attached to the engine, laser etching, or stampings in the engine block indicate the engine unit number/build date code.
The engine ID number will be located rear of LH cylinder head or the front part of LH oil pan rail.
| Callout | Component Name |
|---|---|
| 1 | VIN Derivative, Primary Location |
| 2 | VIN Derivative, Secondary Location |
The engine is also stamped with a VIN derivative number which will be located in either the primary or secondary location, as shown. For additional information, refer to VIN Derivative .
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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.