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 MANUALSCHEVROLET2012CHEVY EXPRESS G2500, VAN PASSENGER, 4.8L ENG VIN AREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1795 (ENGINE CONTROLS AND FUEL - 4.8L, 5.3L, 6.0L, 6.2L, OR 7.0L - REPAIR INSTRUCTIONS)REPAIR INSTRUCTIONSENGINE CONTROL MODULE REPLACEMENTINSTALLATION PROCEDURE

2012 Chevrolet Chevy Express G2500, Van Passenger, 4.8L Eng VIN A

Installation Procedure

2012 Chevrolet Chevy Express G2500, Van Passenger, 4.8L Eng VIN ASECTION Installation Procedure

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2010 GMC Savana Special, 2010 GMC Savana Camper Special, 2010 GMC Savana, 2010 Chevrolet RV Cutaway, and 2010 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: View Of ECM Bracket Tabs, ECM & Bracket

Courtesy of GENERAL MOTORS CORP.

Install the ECM (4) to the bracket (2).
Ensure that the ECM bracket tabs (3) fully engage the ECM.

Fig 2: View Of Engine Wiring Harness Electrical Connectors
Courtesy of GENERAL MOTORS CORP.
Connect the engine wiring harness electrical connectors (2) to the ECM (1).
Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
If a new ECM was installed, program the ECM. Refer to Control Module References .
Using a scan tool, set the remaining engine oil life.

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.