Data Link References
This table identifies which serial data link that a particular control module uses for in-vehicle data transmission. Some control modules may use more than one data link to communicate. Some control 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 | ||
| A11 Radio | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| A12 Digital Radio Receiver Control Module | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| A21 Radio/HVAC Controls - Auxiliary | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| B94L Side Object Sensor - Left | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| B94R Side Object Sensor - Right | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| E13LA Headlamp Assembly - Left | Local Interconnect Network (LIN) | DTC U1500, U1511, U1512, or U1513 |
| K9 Body Control Module |
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| K17 Electronic Brake Control Module | High Speed GMLAN | Scan Tool Does Not Communicate with High Speed GMLAN Device |
| K18 Compass Module | Local Interconnect Network (LIN) | DTC U1500, U1511, U1512, or U1513 |
| K20 Engine Control Module | High Speed GMLAN | Scan Tool Does Not Communicate with High Speed GMLAN Device |
| K26 Headlamp Control Module |
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|
| K29D Seat Heating Control Module - Driver | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| K33 HVAC Control Module | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| K36 Inflatable Restraint Sensing and Diagnostic Module | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| K39 Liftgate Control Module | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| K40 Seat Memory Control Module | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| K41 Front and Rear Parking Assist Control Module | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| K47 Rear Differential Clutch Control Module | High Speed GMLAN | Scan Tool Does Not Communicate with High Speed GMLAN Device |
| K64 Content Theft Deterrent Control Module | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| K71 Transmission Control Module / T12 Automatic Transmission Assembly | High Speed GMLAN | Scan Tool Does Not Communicate with High Speed GMLAN Device |
| K73 Telematics Communication Interface Control Module |
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| K77 Remote Control Door Lock Receiver | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| K85 Passenger Presence Module | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| K109 Frontview Camera Module | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| M74D Window Motor - Driver | Local Interconnect Network (LIN) | DTC U1500, U1511, U1512, or U1513 |
| P16 Instrument Cluster | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| P29 Head-Up Display | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| S84D Door Switch Panel Control Module - Driver |
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| S84P Door Switch Panel Control Module - Passenger | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |