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 MANUALSCHEVROLET2001C3500 HD 8.1 G, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1756 (ENGINE CONTROLS - 6.6L - REPAIR INSTRUCTIONS)REPAIR INSTRUCTIONSENGINE CONTROL MODULE REPLACEMENTINSTALLATION PROCEDURE
2001 Chevrolet C3500 HD 8.1 G, Automatic
Installation Procedure
2001 Chevrolet C3500 HD 8.1 G, AutomaticSECTION Installation Procedure
WARNING: This page is about a different car, the 2001 GMC Sierra, 2001 GMC Cab & Chassis Sierra, 2001 Chevrolet Silverado, and 2001 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- Install the ECM (4) to the ECM mounting bracket (7) ensuring that the mounting tabs (3) are engaged.
- Secure the spring latch (2) to the ECM.
- Refer to Fastener Notice
in Cautions and Notices.
Connect the ECM connectors (6) to the ECM (4).
Tighten
Tighten the ECM connector end screws to 8 N.m (71 lb in).
- Install the ECM cover (8) to the ECM mounting bracket (7), ensuring the mounting tabs on the ECM mounting bracket are engaged into the mounting holes in the ECM cover.
- Connect the negative battery cable.
- If a new ECM is being installed, program the EEPROM.
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.