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 Identification
Engine identification number is stamped on a machined pad on front of cylinder block, immediately forward of right cylinder head. Engine can be identified by the eighth character of the Vehicle Identification Number (VIN). The VIN is located on a metal tag on the top left corner of the instrument panel, visible through the windshield.
| Application | Engine Code | VIN Code |
|---|---|---|
| 5.7L V8 4-Bbl. | LT9 | M |
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.