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.
Removal (4.2L)
Ensure ignition is off. Disconnect negative battery cable. Locate PCM at left front of engine, on intake manifold plenum. See Fig 1. Loosen PCM harness connector bolts. Disconnect PCM harness connectors. Remove 4 PCM mounting bolts. Remove PCM from intake manifold plenum.
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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.