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 MANUALSCHEVROLET2006CHEVY EXPRESS G3500, VAN CARGO, 4.8 VREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 2 (ENGINE CONTROL SYSTEM - 6.6L (LLY) - INTRODUCTION (2 OF 2))REPAIR INSTRUCTIONSENGINE CONTROL MODULE (ECM) REPLACEMENTINSTALLATION PROCEDURE

2006 Chevrolet Chevy Express G3500, Van Cargo, 4.8 V

Installation Procedure

2006 Chevrolet Chevy Express G3500, Van Cargo, 4.8 VSECTION Installation Procedure

WARNING: This page is about a different variant/trim than selected.

Fig 1: ECM Upper Retaining Tabs

GM1655954

Courtesy of GENERAL MOTORS CORP.

Place the bottom edge of the ECM into the bracket lower retainers.
Push the ECM towards the bracket until the upper edge of the ECM snaps into place.

Fig 2: ECM Electrical Connector

GM1655955

Courtesy of GENERAL MOTORS CORP.

Connect the ECM electrical connectors.

Fig 3: Washer Solvent Pump Connector

GM1655946

Courtesy of GENERAL MOTORS CORP.

Slide the washer solvent container tabs into the holes in the bottom of the frame.

Fig 4: Washer Solvent Container

GM1655951

Courtesy of GENERAL MOTORS CORP.

Connect the washer pump connectors.

Fig 5: Washer Solvent Container Bolt

GM1655949

Courtesy of GENERAL MOTORS CORP.

Install the washer solvent container bolt.
Connect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure .
If a NEW ECM was installed, program the ECM. Refer to Control Module References .
Perform the turbocharger learn procedure. Refer to Turbocharger Learn Procedure .

RENDER: 1.0x

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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.