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 | ||||||
Battery Energy Control Module (BECM) | High Speed GMLAN | |||||
Body Control Module (BCM) |
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Digital Radio Receiver (DRR), w/U2K | Low Speed GMLAN | |||||
Electronic Brake Control Module (EBCM) | High Speed GMLAN | |||||
Engine/Powertrain Control Module (ECM/PCM) | High Speed GMLAN | |||||
Fuel System Control Module (FSCM) | High Speed GMLAN | |||||
HVAC Control Module | Low Speed GMLAN | |||||
Instrument Panel Cluster (IPC) | Low Speed GMLAN | |||||
Inflatable Restraint Sensing and Diagnostic Module (SDM) | Low Speed GMLAN | |||||
Passenger Presence System (PPS) | Low Speed GMLAN | |||||
Passenger Door Module | Low Speed GMLAN | |||||
Power Steering Control Module (PSCM) | High Speed GMLAN | |||||
Radio | Low Speed GMLAN | |||||
Rear Differential Clutch Control Module (CCM) | High Speed GMLAN | |||||
Rear Seat Audio Module | Low Speed GMLAN | |||||
Remote Control Door Lock Receiver | Low Speed GMLAN | |||||
Rollover Sensor (ROS) | Low Speed GMLAN | |||||
Rear Park Assist Module | Low Speed GMLAN | |||||
Starter Generator Control Module (SGCM) | High Speed GMLAN | |||||
Theft Deterrent Module (TDM) | Low Speed GMLAN | |||||
Transmission Control Module (TCM) | High Speed GMLAN | |||||
Vehicle Communication Interface Module (VCIM) (OnStar), w/UE1 |
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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 Power Module (APM) Two-mode hybrid only | Powertrain expansion bus | Communicates through the engine / powertrain control module | ||||||
Air Conditioning Control Module (ACCM) Two-mode hybrid only | Low Speed GMLAN | |||||||
Automatic Occupant Sensing (PPS) Module | Low Speed GMLAN | |||||||
Battery Energy Control Module (BECM) Two-mode hybrid only | High Speed GMLAN | |||||||
Body Control Module (BCM) |
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Brake inertial sensor (IS) Two-mode hybrid only | Powertrain expansion bus | Communicates through the engine / powertrain control module | ||||||
Digital Radio Receiver (DRR) | Low Speed GMLAN | |||||||
Electronic Brake Control Module (EBCM) | High Speed GMLAN | |||||||
Engine / Powertrain Control Module (ECM/PCM) | High Speed GMLAN | |||||||
Fuel System Control Module (FSCM) | High Speed GMLAN | |||||||
HVAC Control Module | Low Speed GMLAN | |||||||
Instrument Panel Cluster (IPC) | Low Speed GMLAN | |||||||
Inflatable Restraint Sensing and Diagnostic Module (SDM) | Low Speed GMLAN | |||||||
Passenger Door Module | Low Speed GMLAN | |||||||
Power Steering Control Module (EPS) | High Speed GMLAN | |||||||
Radio | Low Speed GMLAN | |||||||
Rear Differential Clutch Control Module (CCM) | High Speed GMLAN | |||||||
Rear Power Inverter Module (RPIM) Two-mode hybrid only |
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Rear Seat Audio Module | Low Speed GMLAN | |||||||
Remote Control Door Lock Receiver | Low Speed GMLAN | |||||||
Rollover Sensor (ROS) | Low Speed GMLAN | |||||||
Serial Data Gateway Module, Two-mode hybrid only |
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Slip Control Boost (SCB) Module, integral to EBCM on two-mode hybrid | High Speed GMLAN | |||||||
Starter Generator Control Module (SGCM) Two-mode hybrid only | High Speed GMLAN | |||||||
Theft Deterrent Module (TDM) | Low Speed GMLAN | |||||||
Traction Power Inverter Module (TPIM) Two-mode hybrid only |
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Transmission Control Module (TCM) | High Speed GMLAN | |||||||
Universal Park Assist (UPA) Module | Low Speed GMLAN | |||||||
Vehicle Communication Interface Module (VCIM) |
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