Data Link References
This table identifies which serial data link that a particular device uses for in-vehicle data transmission. Some devices may use more than one data link to communicate. Some devices 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 devices listed will be applicable to all vehicles. Refer to the wiring schematics to determine which devices apply. For the description and operation of these serial data communication circuits, refer to Data Link Communications Description and Operation .
| Code | Device | Data Link Type | Diagnostic Procedure |
|---|---|---|---|
| Schematic Reference: Data Communication Schematics | |||
| A11 | Radio |
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| A33 | Media Disc Player |
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| A34 | HVAC Controls - Auxiliary | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| B99 | Steering Wheel Angle Sensor | Chassis High Speed GMLAN | DTC U0077 |
| B119 | Multi-axis Acceleration Sensor | Chassis High Speed GMLAN | DTC U0077 |
| B165 | Content Theft Deterrent Sensor Module | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| B174W | Frontview Camera - Windshield |
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| B200 | Rain Sensor Module | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| B218L | Side Object Sensor Module - Left | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| B233B | Radar Sensor Module - Long Range | Object Bus | DTC U0075 |
| B233LF | Radar Sensor Module - Short Range Left Front | Object Bus | DTC U0075 |
| B233LR | Radar Sensor Module - Short Range Left Rear | Object Bus | DTC U0075 |
| B233RF | Radar Sensor Module - Short Range Right Front | Object Bus | DTC U0075 |
| B233RR | Radar Sensor Module - Short Range Right Rear | Object Bus | DTC U0075 |
| K4 | Assist Step Control Module | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| K9 | Body Control Module |
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| K14 | Distance Sensing Cruise Control Module |
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| K17 | Electronic Brake Control Module |
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| K19 | Suspension Control Module |
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| K20 | Engine Control Module |
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| K29 | Seat Heating Control Module | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| K29R | Seat Heating Control Module - Rear | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| K33 | HVAC Control Module |
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| K36 | Inflatable Restraint Sensing and Diagnostic Module |
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| K38A | Chassis Control Module - Auxiliary |
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| K39 | Liftgate Control Module |
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| K40D | Seat Memory Control Module - Driver |
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| K40P | Seat Memory Control Module - Passenger |
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| K43 | Power Steering Control Module |
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| K56 | Serial Data Gateway Module |
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| K60 | Steering Column Lock Module | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| K69 | Transfer Case Control Module | High Speed GMLAN | Scan Tool Does Not Communicate with High Speed GMLAN Device |
| K71 / T12 | Transmission Control Module / 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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| K74 | Human Machine Interface Control Module |
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| K83 | Park Brake Control Module | High Speed GMLAN | Scan Tool Does Not Communicate with High Speed GMLAN Device |
| K84 | Keyless Entry Control Module | 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 |
| K89 | Immobilizer Control Module | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| K99 | Steering Column Position Control Module | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| K111 | Fuel Pump Driver Control Module | Powertrain Expansion Bus | DTC U0074 |
| K124 | Active Safety Control Module |
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| K133 | Trailer Brake Power Control Module | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| K134D | Seat Bolster Memory Control Module - Driver | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| K134P | Seat Bolster Memory Control Module - Passenger | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| K157 | Video Processing Control Module | Gateway Isolated Low Speed GMLAN | DTC U007C |
| K171 | Hands-Free Liftgate Sensor Control Module | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| K182 | Parking Assist Control Module |
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| K188 | Human Machine Interface Control Module Bypass Module | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| M45 | Rear Wiper Motor | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| M74D | Window Motor - Driver | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| M74P | Window Motor - Passenger | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| M96A | Active Grille Air Shutter 1 Actuator | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| M101L | Seat Belt Retractor Motor Module - Left | Chassis High Speed GMLAN | DTC U0077 |
| M101R | Seat Belt Retractor Motor Module - Right | Chassis High Speed GMLAN | DTC U0077 |
| P16 | Instrument Cluster |
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| P17 | Info Display Module |
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| P25 | Power Sounder Content Theft Deterrent Alarm Module | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| P29 | Head-Up Display | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| S31D | Seat Heating and Cooling Switch - Driver | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| S31P | Seat Heating and Cooling Switch - Passenger | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| S52 | Outside Rearview Mirror Switch | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| S64D | Seat Adjuster Switch - Driver | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| S64P | Seat Adjuster Switch - Passenger | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| S70R | Steering Wheel Controls Switch - Right | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| S79D | Window Switch - Driver | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| S79LR | Window Switch - Left Rear | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| S79P | Window Switch - Passenger | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| S79RR | Window Switch - Right Rear | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| T3 | Audio Amplifier |
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