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	Gateway Isolated Low Speed GMLAN MOST Bus Local Interconnect Network (LIN)	DTC U007D  DTC U0028  DTC U1500-U15FF
A33	Media Disc Player	Gateway Isolated Low Speed GMLAN MOST Bus	DTC U007D  DTC U0028
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	Gateway Expansion High Speed GMLAN Low Speed GMLAN Object Bus	DTC U007B  Scan Tool Does Not Communicate with Low Speed GMLAN Device  DTC U0075
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	High Speed GMLAN Low Speed GMLAN Local Interconnect Network (LIN)	Scan Tool Does Not Communicate with High Speed GMLAN Device  Scan Tool Does Not Communicate with Low Speed GMLAN Device  DTC U1500-U15FF
K14	Distance Sensing Cruise Control Module	High Speed GMLAN Chassis High Speed GMLAN	Scan Tool Does Not Communicate with High Speed GMLAN Device  DTC U0077
K17	Electronic Brake Control Module	High Speed GMLAN Chassis High Speed GMLAN	Scan Tool Does Not Communicate with High Speed GMLAN Device  DTC U0077
K19	Suspension Control Module	High Speed GMLAN Chassis High Speed GMLAN	Scan Tool Does Not Communicate with High Speed GMLAN Device  DTC U0077
K20	Engine Control Module	High Speed GMLAN Powertrain Expansion Bus Local Interconnect Network (LIN)	Scan Tool Does Not Communicate with High Speed GMLAN Device  DTC U0074  DTC U1500-U15FF
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	Low Speed GMLAN Local Interconnect Network (LIN)	Scan Tool Does Not Communicate with Low Speed GMLAN Device  DTC U1500-U15FF
K36	Inflatable Restraint Sensing and Diagnostic Module	Chassis High Speed GMLAN Low Speed GMLAN	DTC U0077  Scan Tool Does Not Communicate with Low Speed GMLAN Device
K38A	Chassis Control Module - Auxiliary	High Speed GMLAN Local Interconnect Network (LIN)	Scan Tool Does Not Communicate with High Speed GMLAN Device  DTC U1500-U15FF
K39	Liftgate Control Module	Low Speed GMLAN Local Interconnect Network (LIN)	Scan Tool Does Not Communicate with Low Speed GMLAN Device  DTC U1500-U15FF
K40D	Seat Memory Control Module - Driver	Low Speed GMLAN Local Interconnect Network (LIN)	Scan Tool Does Not Communicate with Low Speed GMLAN Device  DTC U1500-U15FF
K40P	Seat Memory Control Module - Passenger	Low Speed GMLAN Local Interconnect Network (LIN)	Scan Tool Does Not Communicate with Low Speed GMLAN Device  DTC U1500-U15FF
K43	Power Steering Control Module	High Speed GMALN Chassis High Speed GMALN	Scan Tool Does Not Communicate with High Speed GMLAN Device  DTC U0077
K56	Serial Data Gateway Module	Gateway Expansion High Speed GMLAN Gateway Isolated High Speed GMLAN High Speed GMLAN Gateway Isolated Low Speed GMLAN Low Speed GMLAN Chassis High Speed GMLAN	DTC U007B  DTC U007C  Scan Tool Does Not Communicate with High Speed GMLAN Device  DTC U007D  Scan Tool Does Not Communicate with Low Speed GMLAN Device  DTC U0077
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	Gateway Isolated High Speed GMLAN Gateway Isolated Low Speed GMLAN	DTC U007C  DTC U007D
K74	Human Machine Interface Control Module	Gateway Isolated High Speed GMLAN MOST Bus Local Interconnect Network (LIN)	DTC U007C  DTC U0028  DTC U1500-U15FF
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	Gateway Expansion High Speed GMLAN Chassis High Speed GMLAN Object Bus Low Speed GMLAN	DTC U007B  DTC U0077  DTC U0075  Scan Tool Does Not Communicate with Low Speed GMLAN Device
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	Chassis High Speed GMLAN Low Speed GMLAN	DTC U0077  Scan Tool Does Not Communicate with Low Speed GMLAN Device
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	Gateway Isolated Low Speed GMLAN MOST Bus Local Interconnect Network (LIN)	DTC U007D  DTC U0028  DTC U1500-U15FF
P17	Info Display Module	Gateway Isolated Low Speed GMLAN Local Interconnect Network (LIN)	DTC U007D  DTC U1500-U15FF
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	Gateway Isolated Low Speed GMLAN MOST Bus	DTC U007D  DTC U0028