Data Link References
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. Not all modules listed will be applicable to all vehicles. Refer to the schematics to determine which modules apply. For the description and operation of these serial data communication circuits refer to Data Link Communications Description and Operation .
Data Link References
| Control Module | Data Link Type | Diagnostic Procedure |
|---|---|---|
| Schematic Reference: Data Communication Schematics | ||
| Body Control Module |
|
|
| Digital Radio Receiver Control Module | Mid Speed GMLAN | Scan Tool Does Not Communicate with Mid Speed GMLAN Device |
| Electronic Brake Control Module |
|
|
| Engine Control Module | High Speed GMLAN | Scan Tool Does Not Communicate with High Speed GMLAN Device |
| Front and Rear Parking Assist Control Module | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Fuel Pump Control Module | High Speed GMLAN | Scan Tool Does Not Communicate with High Speed GMLAN Device |
| Headlamp Leveling Control Module | High Speed GMLAN | Scan Tool Does Not Communicate with High Speed GMLAN Device |
| Headlamp - Left | Local Interconnect Network (LIN) | DTC U1500-U15BF |
| Headlamp - Right | Local Interconnect Network (LIN) | DTC U1500-U15BF |
| HVAC Control Module |
|
|
| Inflatable Restraint Sensing and Diagnostic Module | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Info Display Module | Local Interconnect Network (LIN) | DTC U1500-U15BF |
| Instrument Cluster | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Keyless Entry Control Module | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Liftgate Control Module | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Mirror Control Module - Left | Local Interconnect Network (LIN) | DTC U1500-U15BF |
| Mobile Telephone Control Module | Mid Speed GMLAN | Scan Tool Does Not Communicate with Mid Speed GMLAN Device |
| Multi-axis Acceleration Sensor | Chassis High Speed GMLAN | Scan Tool Does Not Communicate with Chassis High Speed GMLAN Device |
| Multimedia Player Interface Module |
|
|
| Parking Brake Control Module | High Speed GMLAN | Scan Tool Does Not Communicate with High Speed GMLAN Device |
| Passenger Presence Detection Module | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Radio |
|
|
| Radio/HVAC Controls | Local Interconnect Network (LIN) | DTC U1500-U15BF |
| Rain Sensor | Local Interconnect Network (LIN) | DTC U1500-U15BF |
| Rear Audio Control Module | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Rear Differential Clutch Control Module |
|
|
| Seat Heating Control Module - Rear |
|
|
| Seat Memory Control Module |
|
|
| Security Siren | Local Interconnect Network (LIN) | DTC U1500-U15BF |
| Steering Wheel Angle Sensor | Chassis High Speed GMLAN | Scan Tool Does Not Communicate with Chassis High Speed GMLAN Device |
| Steering Column Lock Control Module | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Sunroof Control Module | Local Interconnect Network (LIN) | DTC U1500-U15BF |
| Sunroof Sunshade Motor Module | Local Interconnect Network (LIN) | DTC U1500-U15BF |
| Suspension Control Module |
|
|
| Telematics Communication Interface Control Module |
|
|
| Trailer Lighting Control Module | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Transmission Control Module | High Speed GMLAN | Scan Tool Does Not Communicate with High Speed GMLAN Device |
| Ultrasonic Receiver | Local Interconnect Network (LIN) | DTC U1500-U15BF |
| Window Motor - Driver | Local Interconnect Network (LIN) | DTC U1500-U15BF |
| Window Motor - Passenger | Local Interconnect Network (LIN) | DTC U1500-U15BF |
| Window Switch - Driver | Local Interconnect Network (LIN) | DTC U1500-U15BF |
| Window Switch - Left Rear | Local Interconnect Network (LIN) | DTC U1500-U15BF |
| Window Switch - Passenger | Local Interconnect Network (LIN) | DTC U1500-U15BF |
| Window Switch - Right Rear | Local Interconnect Network (LIN) | DTC U1500-U15BF |