Data Link References
WARNING: This page is about a different car, the 2023 GMC Sierra 3500 HD and 2023 GMC Sierra 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
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 Wiring Schematics | |||
| A11 | Radio |
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| A26 | HVAC Controls |
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| B75C | Multifunction Intake Air Sensor | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| B99 | Steering Wheel Angle Sensor | Chassis High Speed GMALN | Scan Tool Does Not Communicate with Chassis High Speed GMLAN Device |
| B136 | Exhaust Particulate Matter Sensor | Powertrain Sensor High Speed GMLAN | DTC U0076 |
| B174W | Frontview Camera - Windshield |
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| B195A | Nitrogen Oxides Sensor 1 | Powertrain Sensor High Speed GMLAN | DTC U0076 |
| B195B | Nitrogen Oxides Sensor 2 | Powertrain Sensor High Speed GMLAN | DTC U0076 |
| B218L | Side Object Sensor Module - Left | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| B218R | Side Object Sensor Module - Right | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| 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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| K17 / K160 | Electronic Brake Control Module / Brake System Control Module |
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| K20 | Engine Control Module |
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| K29F | Seat Heating Control Module - Front | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| K29R | Seat Heating Control Module - Rear | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| K32 | Steering Wheel Heating Control Module | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| K33 | HVAC Control Module |
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| K34 | Glow Plug Control Module | High Speed GMLAN | Scan Tool Does Not Communicate with High Speed GMLAN Device |
| K36 | Inflatable Restraint Sensing and Diagnostic Module |
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| K38A | Chassis Control Module - Auxiliary |
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| K40 | Seat Memory Control Module |
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| K43 | Power Steering Control Module |
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| K44 | Power Take-Off Control Module | High Speed GMLAN | Scan Tool Does Not Communicate with High Speed GMLAN Device |
| 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 |
| K68 | Trailer Lighting Control 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 / Q8 / T12 | Transmission Control Module / Control Solenoid Valve Assembly / 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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| 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 |
| K111 | Fuel Pump Driver Control Module | Powertrain Sensor High Speed GMLAN | DTC U0076 |
| K115 | Reductant Control Module |
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| K133 | Trailer Brake Power Control Module | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| K157 | Video Processing Control Module | Gateway Isolated Low Speed GMLAN | Scan Tool Does Not Communicate with Gateway Isolated Low Speed GMLAN Device |
| K182 | Parking Assist Control Module | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| K194 | Rear Gate Module | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| K214 | Trailer Tire Pressure Indicator Module | Gateway Isolated High Speed GMLAN | Scan Tool Does Not Communicate with Gateway Isolated High Speed GMLAN Device |
| M10 | Charge Air Cooler Coolant Pump | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| M69 | Sunroof 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 |
| M96B | Active Grille Air Shutter 2 Actuator | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| M103 | Turbocharger Vane Position Actuator | Powertrain Sensor High Speed GMLAN | DTC U0076 |
| P16 | Instrument Cluster |
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| P29 | Head-Up Display | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| S32R | Seat Heating Switch - Rear | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| S70R | Steering Wheel Controls Switch - Right | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| S76 | Trailer Brake Control Switch | 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 |
| S146 | Window/Outside Rearview Mirror Switch - Driver | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| T1 | Accessory DC/AC Power Inverter Module | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| T3 | Audio Amplifier |
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