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 may be identified from the Vehicle Identification Number (VIN) stamped on metal tab located on top of instrument panel at lower left of windshield. The VIN number contains 17 characters. The 8th character identifies engine and 10th character establishes model year.
| Application | Engine Code | VIN Code |
|---|---|---|
| 4.3L (262") V6 TBI | LB4 | Z |
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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.