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 .
| Control Module | Data Link Type | Diagnostic Procedure |
|---|---|---|
| Schematic Reference: Data Communication Schematics | ||
| Advanced Parking Assist Control Module | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Body Control Module |
|
|
| Chime Alarm Control Module | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Compass Module | Local Interconnect Network (LIN) | DTC U1500-U15BF |
| Content Theft Deterrent Sensor Module | Local Interconnect Network (LIN) | DTC U1500-U15BF |
| Digital Radio Receiver Control Module | Mid Speed GMLAN | Scan Tool Does Not Communicate with Mid Speed GMLAN Device |
| Driver Door Switch Panel Control Module | Local Interconnect Network (LIN) | DTC U1500-U15BF |
| Driver Mirror Control Module | Local Interconnect Network (LIN) | DTC U1500-U15BF |
| Electronic Brake Control Module |
|
Scan Tool Does Not Communicate with High Speed GMLAN Device or Scan Tool Does Not Communicate with Chassis High Speed GMLAN Device |
| Engine Control Module | High Speed GMLAN | Scan Tool Does Not Communicate with High Speed GMLAN Device |
| Front Seat Heating 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 Control Module | High Speed GMLAN | Scan Tool Does Not Communicate with High Speed GMLAN Device |
| Headlamp High Beam Control Module | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| 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 |
| Infotainment Faceplate Control Module | Local Interconnect Network (LIN) | DTC U1500-U15BF |
| Inside Rear View Mirror | 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 |
| Left Front Window Motor Module | Local Interconnect Network (LIN) | DTC U1500-U15BF |
| Left Headlamp Module | Local Interconnect Network (LIN) | DTC U1500-U15BF |
| Left Rear Door Switch Panel Control Module | Local Interconnect Network (LIN) | DTC U1500-U15BF |
| Left Rear Window Motor Module | Local Interconnect Network (LIN) | DTC U1500-U15BF |
| Liftgate Control Module | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Memory Seat Control Module | Low Speed GMLAN Local Interconnect Network (LIN) |
Scan Tool Does Not Communicate with Low Speed GMLAN Device or DTC U1500-U15BF |
| Mobile Telephone Control Module |
|
Scan Tool Does Not Communicate with Mid Speed GMLAN Device or Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Multi-axis Acceleration Sensor Module | Chassis High Speed GMLAN | Scan Tool Does Not Communicate with Chassis High Speed GMLAN Device |
| Parking Assist Control Module | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Parking Brake Control Module | High Speed GMLAN | Scan Tool Does Not Communicate with High Speed GMLAN Device |
| Parking Heater Control Module (GME Only) | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Passenger Door Switch Panel Control Module | Local Interconnect Network (LIN) | DTC U1500-U15BF |
| Passenger Mirror Control Module | Local Interconnect Network (LIN) | DTC U1500-U15BF |
| Passenger Presence Detection Module | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Power Sounder Content Theft Deterrent Alarm Module | Local Interconnect Network (LIN) | DTC U1500-U15BF |
| Power Steering Control Module |
|
Scan Tool Does Not Communicate with High Speed GMLAN Device or Scan Tool Does Not Communicate with Chassis High Speed GMLAN Device |
| Radio (Base) |
|
Scan Tool Does Not Communicate with Mid Speed GMLAN Device or Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Radio (High Content Navigation) |
|
Scan Tool Does Not Communicate with Mid Speed GMLAN Device or Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Radio (In-Dash CD Changer) |
|
Scan Tool Does Not Communicate with Mid Speed GMLAN Device or Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Radio (Medium Content Navigation) |
|
Scan Tool Does Not Communicate with Mid Speed GMLAN Device or Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Radio (Rear Seat Entertainment Lite) |
|
Scan Tool Does Not Communicate with Mid Speed GMLAN Device or Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Rain/Ambient Light Sensor Module | Local Interconnect Network (LIN) | DTC U1500-U15BF |
| Rear Differential Clutch Control Module |
|
Scan Tool Does Not Communicate with High Speed GMLAN Device or Scan Tool Does Not Communicate with Chassis High Speed GMLAN Device |
| Remote Heater and Air Conditioning Control Module | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Right Front Window Motor Module | Local Interconnect Network (LIN) | DTC U1500-U15BF |
| Right Headlamp Module | Local Interconnect Network (LIN) | DTC U1500-U15BF |
| Right Rear Door Switch Panel Control Module | Local Interconnect Network (LIN) | DTC U1500-U15BF |
| Right Rear Window Motor Module | Local Interconnect Network (LIN) | DTC U1500-U15BF |
| Steering Angle Sensor Module | 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 Sunshade Motor Module | Local Interconnect Network (LIN) | DTC U1500-U15BF |
| Sunroof Window Motor Module | Local Interconnect Network (LIN) | DTC U1500-U15BF |
| Suspension Control Module |
|
Scan Tool Does Not Communicate with High Speed GMLAN Device or Scan Tool Does Not Communicate with Chassis High Speed GMLAN Device |
| Tire Pressure Sensor Locator Module | Local Interconnect Network (LIN) | DTC U1500-U15BF |
| Trailer Interface 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 |
| Transmission Range Indicator Module | Local Interconnect Network (LIN) | DTC U1500-U15BF |
| Variable Power Steering Control Module | High Speed GMLAN | Scan Tool Does Not Communicate with High Speed GMLAN Device |
| Vehicle Communication Interface Module (VCIM) |
|
Scan Tool Does Not Communicate with High Speed GMLAN Device or Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Vehicle Direction Camera Control Module | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |