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 MANUALSCHEVROLET2008CHEVY EXPRESS G2500, VAN CARGO, 6.6 6REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1533 (DATA COMMUNICATION SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDATA LINK REFERENCES
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6
Data Link References
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION Data Link References
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
This table identifies which serial data link that a particular module uses for in-vehicle data transmission. Some modules may use more than one data link to communicate. Some modules may have multiple communication circuits passing through them without actively communicating on that data link. This table is used to assist in correcting a communication malfunction. For the description and operation of these serial data communication circuits refer to Data Link Communications Description and Operation .
| Control Module | Data Link Type | Diagnostic Procedure |
|---|---|---|
| Schematic Reference: Data Communication Schematics | ||
| Accessory DC Power Control Module Assembly (APM), w/HP2 | High Speed Hybrid GMLAN | DTC U0074 |
| Air Conditioning Control Module (ACCM) (Part of AC Compressor), w/HP2 | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Audio Amplifier w/UQA/UQS | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Assist Step Control Module, (Articulating Running Boards (ARB)) w/BRS | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Auxiliary Body Control Module (XBCM) w/JL1, JL4 | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Battery Energy Control Module (BECM) w/HP2 | High Speed GMLAN | Scan Tool Does Not Communicate with High Speed GMLAN Device |
| Body Control Module (BCM) |
|
Scan Tool Does Not Communicate with High Speed GMLAN Device |
| Chime Module w/UL5 | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Digital Radio Receiver (DRR), w/U2K | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Drive Motor Generator Power Inverter Module (PIM) Assembly (Includes Drive Motor Control Module (MCM) 1, 2 and Hybrid Powertrain Control Module (HPCM) ) w/HP2 |
|
|
| Driver Door Switch (DDS) w/YE9 |
|
Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Electronic Brake Control Module (EBCM) | High Speed GMLAN | Scan Tool Does Not Communicate with High Speed GMLAN Device |
| Electronic Suspension Control Module (ESCM) | High Speed GMLAN | Scan Tool Does Not Communicate with High Speed GMLAN Device |
| Engine/Powertrain Control Module (ECM/PCM) |
|
|
| Fuel Pump Control Module (FPCM) w/LFA, LC9, LMG, LY2, LY5, L76, L92 | High Speed GMLAN | Scan Tool Does Not Communicate with High Speed GMLAN Device |
| HVAC Control Module | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Inertial Sensor w/HP2 | High Speed Hybrid GMLAN | DTC U0074 |
| Inside Rearview Mirror (ISRVM) w/TQ5 | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Instrument Panel Cluster (IPC) | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Inflatable Restraint Passenger Presence System (PPS) Module w/AL0 | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Inflatable Restraint Sensing and Diagnostic Module (SDM) | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Inflatable Restraint Roll Over Sensor (ROS) w/ASF | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Liftgate Module (LGM) w/E61 | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Memory Seat Module (MSM)/Driver Position Module (DPM) w/AN3 | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Passenger Door Switch (PDS) w/YE9 |
|
Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Power Steering Control Module (PSCM) w/HP2 | High Speed GMLAN | Scan Tool Does Not Communicate with High Speed GMLAN Device |
| Radio | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Rear Heated/Vented Seat Control Module (RHVSM) w/KA6 | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Rear Seat Audio (RSA) w/UK6 | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Remote Control Door Lock Receiver (RCDLR) w/AP3, AP8 | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Serial Data Gateway Module (SDGM) w/HP2 |
|
|
| Theft Deterrent Module (TDM) | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Transfer Case Control Module (TCCM) w/NP8, NR3, NQH, NQF, NGQ | High Speed GMLAN | Scan Tool Does Not Communicate with High Speed GMLAN Device |
| Transmission Control Module (TCM) | High Speed GMLAN | Scan Tool Does Not Communicate with High Speed GMLAN Device |
| Ultrasonic Parking Aid (UPA) Module w/UD7 | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Vehicle Communication Interface Module (VCIM) (OnStar®), w/UE1 |
|
|
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.