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 code number is suffix of engine identification number. Code number is located on label of right valve cover. The Vehicle Identification Number (VIN) is located on a metal plate on top left side of instrument panel. Engine can be identified by 8th character of the VIN.
| Application | Engine Code | VIN Code | |
|---|---|---|---|
| 6.2L V8 Diesel | |||
| Light Duty | LH6 | C | |
| Heavy Duty | LL4 | J | |
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.