In this article, you will find information about the fuses of the GMC Yukon/Yukon XL (GMT800) (models 2003, 2004, 2005, and 2006) , including diagrams of the fuse boxes, a list of fuses and relays, their designation, and the location of the fuse blocks within the vehicle.
Checking and Replacing Fuses in GMC Yukon The wiring circuits in your vehicle are protected from short circuits by a combination of fuses, circuit breakers and fusible thermal links. This greatly reduces the chance of fires caused by electrical problems. Look at the silver-colored band inside the fuse. If the band is broken or melted, replace the fuse. You may have spare fuses located behind the fuse block access door. These can be used to replace a bad fuse.
Caution!
Be sure you replace a bad fuse with a new one of the identical size and rating. Always keep the covers on any electrical component. Location of Fuse BoxesInstrument Panel Fuse Block: The fuse block access door is on the driver’s side edge of the instrument panel. Pull off the cover to access the fuse block.
Center Instrument Panel Fuse Block: The center instrument panel fuse block is located underneath the instrument panel, to the left of the steering column.
Underhood Fuse Block: The underhood electrical center is located on the driver’s side of the engine compartment near the battery. Lift the cover for access to the fuse/relay block.
The windshield wiper motor is protected by an internal circuit breaker and a fuse. If the motor overheats due to heavy snow, etc., the wiper will stop until the motor cools.
Fuse Box Diagrams 2003Instrument Panel Fuse Block
List of fuses in the Instrument Panel Fuse Block (2003) Fuses Usage RR Wiper Rear Window Wiper Switch SEO ACCY Special Equipment Option Accessory WS WPR Windshield Wipers TBC ACCY Truck Body Controller Accessory IGN 3 Ignition, Heated Seats 4WD Four-Wheel Drive System, Auxiliary Battery HTR A/C Climate Control System LOCK Power Door Lock Relay (Lock Function) HVAC 1 Inside Rearview Mirror, Climate Control System L DOOR Driver’s Door Harness Connection CRUISE Cruise Control UNLOCK Power Door Lock Relay (Unlock Function) RR FOG LP Rear Fog Lamp (Export Only) BRAKE Anti-Lock Brake System DRIVER UNLOCK Power Door Lock Relay (Driver’s Door Unlock Function) IGN 0 PCM, TCM TBC IGN 0 Truck Body Controller VEH CHMSL Vehicle and Trailer High Mounted Stoplamp LT TRLR ST/TRN Left Turn Signal / Stop Trailer LT TRN Left Turn Signals and Sidemarkers VEH STOP Vehicle Stoplamps, Brake Module, Electronic Throttle Control Module RT TRLR ST/TRN Right Turn Signal / Stop Trailer RT TRN Right Turn Signals and Sidemarkers BODY Harness Connector DDM Driver Door Module AUX PWR 2 Rear Cargo Area Power Outlets LOCKS Power Door Lock System ECC Rear Electronic Climate Control TBC 2C Truck Body Controller FLASH Flasher Module CB LT DOORS Left Power Window Circuit Breaker TBC 2B Truck Body Controller TBC 2A Truck Body Controller
Center Instrument Panel Fuse Block
List of fuses in the Center Instrument Panel Fuse Block (2003) Device Usage SEO Special Equipment Option TRAILER Trailer Brake Wiring UPFIT Upfitter (Not Used) SL RIDE Ride Control Harness Connection HDLR 2 Headliner Wiring Connector BODY Body Wiring Connector DEFOG Rear Defogger Relay HDLNR 1 Headliner Wiring Connector 1 SPARE RELAY Not Used CB SEAT Driver and Passenger Seat Module Circuit Breaker CB RT DOOR Right Power Window Circuit Breaker SPARE Not Used INFO Infotainment Harness Connection
Underhood Fuse Block
List of fuses in the Underhood Fuse Block (2003) Fuses Usage GLOW PLUG Not Used CUST FEED Gasoline Accessory Power STUD #1 Auxiliary Power (Single Battery and Diesels Only) / Dual Battery (TP2) Do not install fuse. MBEC Mid Bussed Electrical Center Power Feed, Front Seats, Right Doors BLOWER Front Climate Control Fan LBEC Left Bussed Electrical Center, Door Modules, Door Locks, Auxiliary Power Outlet-Rear Cargo Area and Instrument Panel STUD 2 Accessory Power / Trailer Wiring Brake Feed ABS Anti-Lock Brakes VSES/ECAS Vehicle Stability IGN A Ignition Power IGN B Ignition Power LBEC 1 Left Bussed Electrical Center, Left Doors, Truck Body Controller, Flasher Module TRL PARK Parking Lamps Trailer Wiring RR PARK Right Rear Parking and Sidemarker Lamps LR PARK Left Rear Parking and Sidemarker Lamps PARK LP Parking Lamps Relay STARTER Starter Relay INTPARK Interior Lamps STOP LP Stoplamps TBC BATT Truck Body Controller Battery Feed SUNROOF Sunroof SEO B2 Off-Road Lamps 4WS Vent Solenoid Canister/Quadrasteer Module Power RR HVAC Rear Climate Control AUX PWR Auxiliary Power Outlet - Console IGN 1 Ignition Relay PCM 1 Powertrain Control Module ETC/ECM Electronic Throttle Control, Electronic Brake Controller IGN E Instrument Panel Cluster, Air Conditioning Relay, Turn Signal / Hazard Switch, Starter Relay RTD Ride Control TRL B/U Backup Lamps Trailer Wiring PCM B Powertrain Control Module, Fuel Pump F/PMP Fuel Pump (Relay) B/U LP Back-up Lamps, Automatic Transmission Shift Lock Control System RR DEFOG Rear Window Defogger HDLP-HI Headlamp High Beam Relay PRIME Not Used SIR Supplemental Inflatable Restraint System FRT PARK Front Parking Lamps, Sidemarker Lamps DRL Daytime Running Lamps (Relay) SEO IGN Rear Defog Relay TBC IGN1 Truck Body Controller Ignition HI HDLP-LT High Beam Headlamp-Left LH HID Not Used DRL Daytime Running Lamps IPC/DIC Instrument Panel Cluster / Driver Information Center HVAC/ECAS Climate Control Controller CIG LTR Cigarette Lighter HI HDLP-RT High Beam Headlamp-Right HDLP-LOW Headlamp Low Beam Relay A/C COMP Air Conditioning Compressor A/C COMP Air Conditioning Compressor Relay RR WPR Rear Wiper / Washer RADIO Audio System SEO B1 Mid Bussed Electrical Center, HomeLink, Rear Heated Seats LO HDLP-LT Headlamp Low Beam-Left BTSI Brake Transmission Shift Interlock System CRANK Starting System LO HDLP-RT Headlamp Low Beam-Right FOG LP Fog Lamp Relay FOG LP Fog Lamps HORN Horn Fuse HORN Horn Relay W/S WASH Windshield and Rear Window Washer Pump Relay W/S WASH Windshield and Rear Window Washer Pump INFO OnStar / Rear Seat Entertainment RADIO AMP Radio Amplifier RH HID Not Used EAP Electric Adjustable Pedals TREC All-Wheel Drive Module SBA Supplemental Brake Assist 1* Gasoline Engine and Fuel Injection Rail #2 2* Gasoline Engine and Fuel Injection Rail #1 3* Gasoline Engine; Oxygen Sensors 4* Gasoline Engine; Oxygen Sensors 5* PCM Ignition
2004Instrument Panel Fuse Block
List of fuses in the Instrument Panel Fuse Block (2004) Fuses Usage RR Wiper Rear Window Wiper Switch SEO ACCY Special Equipment Option Accessory WS WPR Windshield Wipers TBC ACCY Truck Body Controller Accessory IGN 3 Ignition, Heated Seats 4WD Four-Wheel Drive System, Auxiliary Battery HTR A/C Climate Control System LOCK Power Door Lock Relay (Lock Function) HVAC 1 Inside Rearview Mirror, Climate Control System L DOOR Driver’s Door Harness Connection CRUISE Cruise Control UNLOCK Power Door Lock Relay (Unlock Function) RR FOG LP Rear Fog Lamp (Export Only) BRAKE Anti-Lock Brake System DRIVER UNLOCK Power Door Lock Relay (Driver’s Door Unlock Function) IGN 0 PCM, TCM TBC IGN 0 Truck Body Controller VEH CHMSL Vehicle and Trailer High Mounted Stoplamp LT TRLR ST/TRN Left Turn Signal / Stop Trailer LT TRN Left Turn Signals and Sidemarkers VEH STOP Vehicle Stoplamps, Brake Module, Electronic Throttle Control Module RT TRLR ST/TRN Right Turn Signal / Stop Trailer RT TRN Right Turn Signals and Sidemarkers BODY Harness Connector DDM Driver Door Module AUX PWR 2 Rear Cargo Area Power Outlets LOCKS Power Door Lock System ECO Rear Electronic Climate Control, Liftgate TBC 2C Truck Body Controller FLASH Flasher Module CB LT DOORS Left Power Window Circuit Breaker TBC 2B Truck Body Controller TBC 2A Truck Body Controller
Center Instrument Panel Fuse Block
List of fuses in the Center Instrument Panel Fuse Block (2004) Device Usage SEO Special Equipment Option TRAILER Trailer Brake Wiring UPFIT Upfitter (Not Used) SL RIDE Ride Control Harness Connection HDLR 2 Headliner Wiring Connector BODY Body Wiring Connector DEFOG Rear Defogger Relay HDLNR1 Headliner Wiring Connector 1 SPARE RELAY Not Used CB SEAT Driver and Passenger Seat Module Circuit Breaker CB RT DOOR Right Power Window Circuit Breaker SPARE Not Used INFO Infotainment Harness Connection
Underhood Fuse Block
List of fuses in the Underhood Fuse Block (2004) Fuses Usage GLOW PLUG Not Used CUST FEED Gasoline Accessory Power STUD #1 Auxiliary Power (Single Battery and Diesels Only) / Dual Battery (TP2) Do not install fuse. MBEC Mid Bussed Electrical Center Power Feed, Front Seats, Right Doors BLOWER Front Climate Control Fan LBEC Left Bussed Electrical Center, Door Modules, Door Locks, Auxiliary Power Outlet-Rear Cargo Area and Instrument Panel STUD 2 Accessory Power / Trailer Wiring Brake Feed ABS Anti-Lock Brakes VSES/ECAS Vehicle Stability IGN A Ignition Power IGN B Ignition Power LBEC 1 Left Bussed Electrical Center, Left Doors, Truck Body Controller, Flasher Module TRL PARK Parking Lamps Trailer Wiring RR PARK Right Rear Parking and Sidemarker Lamps LR PARK Left Rear Parking and Sidemarker Lamps PARK LP Parking Lamps Relay STARTER Starter Relay INTPARK Interior Lamps STOP LP Stoplamps TBC BATT Truck Body Controller Battery Feed SUNROOF Sunroof SEO B2 Off-Road Lamps 4WS Vent Solenoid Canister / Quadrasteer Module Power RR HVAC Rear Climate Control AUX PWR Auxiliary Power Outlet - Console IGN 1 Ignition Relay PCM 1 Powertrain Control Module ETC/ECM Electronic Throttle Control, Electronic Brake Controller IGN E Instrument Panel Cluster, Air Conditioning Relay, Turn Signal / Hazard Switch, Starter Relay RTD Ride Control TRL B/U Backup Lamps Trailer Wiring PCM B Powertrain Control Module, Fuel Pump F/PMP Fuel Pump (Relay) B/U LP Back-up Lamps, Automatic Transmission Shift Lock Control System RR DEFOG Rear Window Defogger HDLP-HI Headlamp High Beam Relay PRIME Not Used SIR Supplemental Inflatable Restraint System FRT PARK Front Parking Lamps, Sidemarker Lamps DRL Daytime Running Lamps (Relay) SEO IGN Rear Defog Relay TBC IGN1 Truck Body Controller Ignition HI HDLP-LT High Beam Headlamp-Left LH HID Not Used DRL Daytime Running Lamps IPC/DIC Instrument Panel Cluster / Driver Information Center HVAC/ECAS Climate Control Controller CIG LTR Cigarette Lighter HI HDLP-RT High Beam Headlamp-Right HDLP-LOW Headlamp Low Beam Relay A/C COMP Air Conditioning Compressor A/C COMP Air Conditioning Compressor Relay RR WPR Rear Wiper / Washer RADIO Audio System SEO B1 Mid Bussed Electrical Center, HomeLink, Rear Heated Seats LO HDLP-LT Headlamp Low Beam-Left BTSI Brake Transmission Shift Interlock System CRANK Starting System LO HDLP-RT Headlamp Low Beam-Right FOG LP Fog Lamp Relay FOG LP Fog Lamps HORN Horn Fuse HORN Horn Relay W/S WASH Windshield and Rear Window Washer Pump Relay W/S WASH Windshield and Rear Window Washer Pump INFO OnStar/Rear Seat Entertainment RADIO AMP Radio Amplifier RH HID Not Used EAP Electric Adjustable Pedals TREC All-Wheel Drive Module SBA Supplemental Brake Assist 1* Gasoline Engine and Fuel Injection Rail #2 2* Gasoline Engine and Fuel Injection Rail #1 3* Gasoline Engine; Oxygen Sensors 4* Gasoline Engine; Oxygen Sensors 5* PCM Ignition
2005Instrument Panel Fuse Block
List of fuses in the Instrument Panel Fuse Block (2005) Fuses Usage RR WPR Rear Window Wiper Switch SEO ACCY Special Equipment Option Accessory WS WPR Windshield Wipers TBC ACCY Truck Body Controller Accessory IGN 3 Ignition, Heated Seats 4WD Four-Wheel Drive System, Auxiliary Battery HTR A/C Climate Control System LOCK Power Door Lock Relay (Lock Function) HVAC 1 Inside Rearview Mirror, Climate Control System L DOOR Driver’s Door Harness Connection CRUISE Cruise Control UNLOCK Power Door Lock Relay (Unlock Function) RR FOG LP Rear Fog Lamp (Export Only) BRAKE Anti-Lock Brake System DRIVER UNLOCK Power Door Lock Relay (Driver’s Door Unlock Function) IGN 0 PCM, TCM TBC IGN 0 Truck Body Controller VEH CHMSL Vehicle and Trailer High Mounted Stoplamp LT TRLR ST/TRN Left Turn Signal / Stop Trailer LT TRN Left Turn Signals and Sidemarkers VEH STOP Vehicle Stoplamps, Brake Module, Electronic Throttle Control Module RT TRLR ST/TRN Right Turn Signal / Stop Trailer RT TRN Right Turn Signals and Sidemarkers BODY Harness Connector DDM Driver Door Module AUX PWR 2 Rear Cargo Area Power Outlets LOCKS Power Door Lock System ECC Rear Electronic Climate Control, Liftgate TBC 2C Truck Body Controller FLASH Flasher Module CB LT DOORS Left Power Window Circuit Breaker TBC 2B Truck Body Controller TBC 2A Truck Body Controller 1* Gasoline Engine and Fuel Injection Rail #2 2* Gasoline Engine and Fuel Injection Rail #1 3* Gasoline Engine; Oxygen Sensors 4* Gasoline Engine; Oxygen Sensors 5* PCM Ignition
Center Instrument Panel Fuse Block
List of fuses in the Center Instrument Panel Fuse Block (2005) Device Usage SEO Special Equipment Option TRAILER Trailer Brake Wiring UPFIT Upfitter (Not Used) SL RIDE Ride Control Harness Connection HDLR 2 Headliner Wiring Connector BODY Body Wiring Connector DEFOG Rear Defogger Relay HDLNR 1 Headliner Wiring Connector 1 SPARE RELAY Not Used CB SEAT Driver and Passenger Seat Module Circuit Breaker CB RT DOOR Right Power Window Circuit Breaker SPARE Not Used INFO Infotainment Harness Connection
Underhood Fuse Block
List of fuses in the Underhood Fuse Block (2005) Fuses Usage GLOW PLUG Not Used CUST FEED Gasoline Accessory Power HYBRID Hybrid STUD #1 Auxiliary Power (Single Battery and Diesels Only) / Dual Battery (TP2) Do not install fuse. MBEC Mid Bussed Electrical Center Power Feed, Front Seats, Right Doors BLOWER Front Climate Control Fan LBEC Left Bussed Electrical Center, Door Modules, Door Locks, Auxiliary Power Outlet - Rear Cargo Area and Instrument Panel STUD 2 Accessory Power / Trailer Wiring Brake Feed ABS Anti-Lock Brakes VSES/ECAS Vehicle Stability IGN A Ignition Power IGN B Ignition Power LBEC 1 Left Bussed Electrical Center, Left Doors, Truck Body Controller, Flasher Module TRL PARK Parking Lamps Trailer Wiring RR PARK Right Rear Parking and Sidemarker Lamps LR PARK Left Rear Parking and Sidemarker Lamps PARK LP Parking Lamps Relay STRTR Starter Relay INTPARK Interior Lamps STOP LP Stoplamps TBC BATT Truck Body Controller Battery Feed S/ROOF Sunroof SEO B2 Off-Road Lamps 4WS Vent Solenoid Canister / Ouadrasteer Module Power RR HVAC Rear Climate Control AUX PWR Auxiliary Power Outlet - Console IGN 1 Ignition Relay PCM 1 Powertrain Control Module ETC/ECM Electronic Throttle Control, Electronic Brake Controller IGN E Instrument Panel Cluster, Air Conditioning Relay, Turn Signal / Hazard Switch, Starter Relay RTD Ride Control TRL B/U Backup Lamps Trailer Wiring PCM B Powertrain Control Module, Fuel Pump F/PMP Fuel Pump (Relay) B/U LP Back-up Lamps, Automatic Transmission Shift Lock Control System RR DEFOG Rear Window Defogger HDLP-HI Headlamp High Beam Relay PRIME Not Used AIRBAG Supplemental Inflatable Restraint System FRT PARK Front Parking Lamps, Sidemarker Lamps DRL Daytime Running Lamps (Relay) SEO IGN Rear Defog Relay TBC IGN1 Truck Body Controller Ignition HI HDLP-LT High Beam Headlamp-Left LH HID Not Used DRL Daytime Running Lamps RVC Regulated Voltage Control IPC/DIC Instrument Panel Cluster / Driver Information Center HVAC/ECAS Climate Control Controller CIG LTR Cigarette Lighter HI HDLP-RT High Beam Headlamp-Right HDLP-LOW Headlamp Low Beam Relay A/C COMP Air Conditioning Compressor A/C COMP Air Conditioning Compressor Relay RR WPR Rear Wiper / Washer RADIO Audio System SEO B1 Mid Bussed Electrical Center, HomeLink, Rear Heated Seats LO HDLP-LT Headlamp Low Beam-Left BTSI Brake Transmission Shift Interlock System CRNK Starting System LO HDLP-RT Headlamp Low Beam-Right FOG LP Fog Lamp Relay FOG LP Fog Lamps HORN Horn Fuse HORN Horn Relay W/S WASH Windshield and Rear Window Washer Pump Relay W/S WASH Windshield and Rear Window Washer Pump INFO OnStar / Rear Seat Entertainment RADIO AMP Radio Amplifier RH HID Not Used EAP Electric Adjustable Pedals TREC All-Wheel Drive Module SBA Supplemental Brake Assist 1* Gasoline Engine and Fuel Injection Rail #2 2* Gasoline Engine and Fuel Injection Rail #1 3* Gasoline Engine; Oxygen Sensors 4* Gasoline Engine; Oxygen Sensors 5* PCM Ignition
2006Instrument Panel Fuse Block
List of fuses in the Instrument Panel Fuse Block (2006) Fuses Usage RR WPR Rear Window Wiper Switch SEO ACCY Special Equipment Option Accessory WS WPR Windshield Wipers TBC ACCY Truck Body Controller Accessory IGN 3 Ignition, Heated Seats 4WD Four-Wheel Drive System, Auxiliary Battery HTR A/C Climate Control System LCK Power Door Lock Relay (Lock Function) HVAC 1 Inside Rearview Mirror, Climate Control System LT DR Driver’s Door Harness Connection CRUISE Cruise Control UNLCK Power Door Lock Relay (Unlock Function) RR FOG LP Rear Fog Lamp (Export Only) BRAKE Anti-Lock Brake System DRIVER UNLCK Power Door Lock Relay (Driver’s Door Unlock Function) IGN 0 PCM, TCM TBC IGN 0 Truck Body Controller VEH CHMSL Vehicle and Trailer High Mounted Stoplamp LT TRLR ST/TRN Left Turn Signal / Stop Trailer LT TRN Left Turn Signals and Sidemarkers VEH STOP Vehicle Stoplamps, Brake Module, Electronic Throttle Control Module RT TRLR ST/TRN Right Turn Signal / Stop Trailer RT TRN Right Turn Signals and Sidemarkers BODY Harness Connector DDM Driver Door Module AUX PWR 2, M/GATE Rear Cargo Area Power Outlets LCKS Power Door Lock System ECC, TPM Rear Electronic Climate Control, Liftgate, Tire Pressure Monitoring System TBC 2C Truck Body Controller HAZRD Flasher Module CB LT DRS Left Power Window Circuit Breaker TBC 2B Truck Body Controller TBC 2A Truck Body Controller
Center Instrument Panel Fuse Block
List of fuses in the Center Instrument Panel Fuse Block (2006) Device Usage SEO Special Equipment Option TRAILER Trailer Brake Wiring UPFIT Upfitter (Not Used) SL RIDE Ride Control Harness Connection HDLR 2 Headliner Wiring Connector BODY Body Wiring Connector DEFOG Rear Defogger Relay HDLNR 1 Headliner Wiring Connector 1 SPARE RELAY Not Used CB SEAT Driver and Passenger Seat Module Circuit Breaker CB RT DOOR Right Power Window Circuit Breaker SPARE Not Used INFO Infotainment Harness Connection
Underhood Fuse Block
List of fuses in the Underhood Fuse Block (2006) Fuses Usage GLOW PLUG Not Used CUST FEED Gasoline Accessory Power HYBRID Not Used STUD #1 Auxiliary Power (Single Battery and Diesels Only) / Dual Battery (TP2) Do not install fuse. MBEC Mid Bussed Electrical Center Power Feed, Front Seats, Right Doors BLWR Front Climate Control Fan LBEC Left Bussed Electrical Center, Door Modules, Door Locks, Auxiliary Power Outlet - Rear Cargo Area and Instrument Panel STUD #2* Accessory Power / Trailer Wiring Brake Feed ABS Anti-lock Brakes VSES/ECAS Automatic Level Control (ALC) Compressor IGN A Ignition Power IGN B Ignition Power LBEC 1 Left Bussed Electrical Center, Left Doors, Truck Body Controller, Flasher Module TRLPARK Parking Lamps Trailer Wiring RR PARK Right Rear Parking and Sidemarker Lamps LR PARK Left Rear Parking and Sidemarker Lamps PARK LP Parking Lamps Relay STRTR Starter Relay INTPARK Interior Lamps STOP LP Stoplamps TBC BATT Truck Body Controller Battery Feed SEO B2 Off-Road Lamps 4WS Not Used AUX PWR Auxiliary Power Outlet - Console PCM 1 Powertrain Control Module ETC/ECM Electronic Throttle Control, Electronic Brake Controller IGN E Instrument Panel Cluster, Air Conditioning Relay, Turn Signal/Hazard Switch, Starter Relay RTD Electronic Suspension Control, Automatic Level Control (ALC) Exhaust TRL B/U Backup Lamps Trailer Wiring F/PMP Fuel Pump (Relay) B/U LP Back-up Lamps, Automatic Transmission Shift Lock Control System RR DEFOG Rear Window Defogger HDLP-HI Headlamp High Beam Relay PRIME Not Used AIRBAG Supplemental Inflatable Restraint System FRT PARK Front Parking Lamps, Sidemarker Lamps DRL Daytime Running Lamps (Relay) SEO IGN Rear Defog Relay TBC IGN1 Truck Body Controller Ignition HI HDLP-LT Driver’s Side High Beam Headlamp LH HID Not Used DRL Daytime Running Lamps RVC Regulated Voltage Control IPC/DIC Instrument Panel Cluster / Driver Information Center HVAC/ECAS Climate Control Controller CIG LTR Cigarette Lighter HI HDLP-RT Passenger’s Side High Beam Headlamp HDLP-LOW Headlamp Low Beam Relay A/C COMP Air Conditioning Compressor Relay A/C COMP Air Conditioning Compressor TCMB Transmission Control Module RR WPR Rear Wiper/Washer RADIO Audio System SEO B1 Mid Bussed Electrical Center, Universal Home Remote System, Rear Heated Seats LO HDLP-LT Driver’s Side Headlamp Low Beam BTSI Brake Transmission Shift Interlock System CRNK Starting System LO HDLP-RT Passenger’s Side Headlamp Low Beam FOG LP Fog Lamps Relay FOG LP Fog Lamps HORN Horn Relay W/S WASH Windshield and Rear Window Washer Pump Relay W/S WASH Windshield and Rear Window Washer Pump INFO OnStar / Rear Seat Entertainment RADIO AMP Radio Amplifier RH HID Not Used HORN Horn EAP Electric Adjustable Pedals TREC All-Wheel Drive Module (If Equipped) SBA Supplemental Brake Assist 1* Gasoline Engine and Fuel Injection Rail #2 2* Gasoline Engine and Fuel Injection Rail #1 3* Gasoline Engine; Oxygen Sensors 4* Gasoline Engine; Oxygen Sensors 5* Ignition 1 6* Powertrain Control Module, Fuel Pump 7* Rear Climate Control 8* Sunroof