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.
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HOMESERVICE MANUALSCHEVROLET2005CHEVY EXPRESS G3500, VAN PASSENGER, LQ4REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 1 (ENGINE CONTROL SYSTEM - 4.3L - INTRODUCTION)REPAIR INSTRUCTIONSPOWERTRAIN CONTROL MODULE (PCM) REPLACEMENTINSTALLATION PROCEDURE
2005 Chevrolet Chevy Express G3500, Van Passenger, LQ4
Installation Procedure
2005 Chevrolet Chevy Express G3500, Van Passenger, LQ4SECTION Installation Procedure
WARNING: This page is about a different variant/trim than selected.
- Install the PCM to the PCM mounting tray.
- Secure the spring latch to the PCM.
- Connect the PCM connectors to the PCM.
Tighten: Tighten the PCM connector end fasteners to 8 N.m (71 lb in).
- Connect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.
- If a new PCM is being installed, program the PCM. Refer to Control Module References in Computer/Integrating Systems.
NOTE:
Refer to Fastener Notice
in Cautions and Notices.
RENDER: 1.0x
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.