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 1759 (PROGRAMMING AND SETUP - ALL SYSTEMS)DIAGNOSTIC INFORMATION AND PROCEDURESCONTROL MODULE REFERENCES

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

Control Module References

2012 Chevrolet Chevy Express G2500, Van Passenger, 4.8L Eng VIN ASECTION Control Module References

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.

Control Module/Scan Tool Information	Schematic	Repair Instruction	Programming and Setup
Data Link References Diagnostic System Check - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle Symptoms - Vehicle
Body Control Module Scan Tool Information	Body Control System Schematics	Body Control Module Replacement	Body Control Module Programming and Setup
Control Solenoid Valve and Transmission Control Module Assembly Transmission Control Module Scan Tool Information (4L60-E) or Transmission Control Module Scan Tool Information (6L45/6L50/6L80/6L90) 6L45/6L50/6L80/6L90 transmission	Automatic Transmission Controls Schematics	Control Solenoid Valve and Transmission Control Module Assembly Replacement	Control Solenoid Valve and Transmission Control Module Assembly Programming and Setup (6L45/6L50/6L80/6L90)
Electronic Brake Control Module Scan Tool Information (Without JL4) or Electronic Brake Control Module Scan Tool Information (With JL4)	Antilock Brake System Schematics	Electronic Brake Control Module Replacement	Electronic Brake Control Module Programming and Setup
Electronic Compass Module	Instrument Cluster Schematics	Electronic Compass Module Replacement or Engine Control Module Replacement (6.6L, LGH)	Electronic Compass Module Programming and Setup
Engine Control Module Scan Tool Information (with RPO LMM) or Engine Control Module Scan Tool Information (V8 Gasoline) or Engine Control Module Scan Tool Information (w/LU3)	Engine Controls Schematics for the 4.3L engine Engine Controls Schematics for the 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L engines Engine Controls Schematics for the 6.6L (LGH or LML) engine Engine Controls Schematics for the 6.6L (LMM) engine	Engine Control Module Replacement for the 4.3L engine Engine Control Module Replacement for the 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L engines Engine Control Module Replacement for the 6.6L (LGH or LML) engine Engine Control Module Replacement for the 6.6L (LMM) engine	Engine Control Module Programming and Setup (Gasoline Engines) or Engine Control Module Programming and Setup (W/RPO LMM)
Fuel Pump Flow Control Module Scan Tool Information	Engine Controls Schematics	Fuel Pump Flow Control Module Replacement	Fuel Pump Flow Control Module Programming and Setup
Glow Plug Control Module Scan Tool Information	for the 6.6L (LGH or LML) engine or Engine Controls Schematics for the 6.6L (LMM) engine	Glow Plug Control Module Replacement for the 6.6L (LGH or LML) engine or Glow Plug Control Module Replacement for the 6.6L (LMM) engine	Glow Plug Control Module Programming and Setup
Inflatable Restraint Passenger Presence System Scan Tool Information	SIR Schematics	Inflatable Restraint Passenger Presence System Replacement - Front	Passenger Presence System Programming and Setup
Inflatable Restraint Sensing and Diagnostic Module Scan Tool Information	SIR Schematics	Inflatable Restraint Sensing and Diagnostic Module Replacement	Inflatable Restraint Sensing and Diagnostic Module Programming and Setup
Inflatable Restraint Vehicle Rollover Sensor Scan Tool Information	SIR Schematics	Inflatable Restraint Vehicle Rollover Sensor Replacement	Inflatable Restraint Vehicle Rollover Sensor Programming and Setup
Instrument Cluster Scan Tool Information	Instrument Cluster Schematics	Instrument Cluster Replacement	Instrument Cluster Programming and Setup
Radio	Radio/Navigation System Schematics	Radio Replacement	Radio Programming and Setup
Remote Control Door Lock Receiver Scan Tool Information	Remote Function Schematics	Remote Control Door Lock Receiver Replacement	Remote Control Door Lock Receiver Programming and Setup
Theft Deterrent Module Scan Tool Information	Immobilizer Schematics	Theft Deterrent Module Replacement	Theft Deterrent Module Programming and Setup
Transmission Control Module Scan Tool Information (4L60-E) or Transmission Control Module Scan Tool Information (6L45/6L50/6L80/6L90) 4L60-E/4L65-E/4L70-E transmission	Automatic Transmission Controls Schematics	Transmission Control Module Replacement	Transmission Control Module Programming and Setup

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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.