Fuses and relays Cadillac Escalade (GMT800; 2003–2006)

This article provides a detailed overview of the fuse box diagrams for the second-generation Cadillac Escalade (GMT800), covering the 2003, 2004, 2005, and 2006 model years.

The fuses designated as “AUX PWR 2, M/GATE” and “AUX PWR 2” in the passenger compartment, along with “AUX PWR” and “CIG LTR” in the engine compartment, supply power to the cigarette lighter and 12V power outlets.

Passenger Compartment

There are two fuse blocks located in the passenger compartment. The primary fuse block is situated on the left edge of the instrument panel.  

Fuse Box #1

To access the fuses, remove the plastic cover.

Access panel removal.

General layout.

Diagram
Name	Description
4WD	Air Suspension Switch/Module
AUX PWR 2, M/GATE	Rear Cargo Area 12V Power Outlets  Instrument Panel 12V Power Outlets Cigar Lighter
BODY	Harness Connector
BRAKE	Brake Switch
CB LT DRS	Power Window Circuit Breaker (Left Rear) Driver Door Module (Left Rear)
CRUISE	Cruise Control System
DDM	Driver Door Module
DRIVER UNLCK	Power Door Lock Relay (Driver Door Unlock Function)
ECO TPM	Tire Pressure Monitoring System (TPMS) / Liftgate
HAZRD	Turn Signal/Hazard Flasher Module
HTR A/C	Climate Control Module (HVAC)
HVAC 1	Inside Rearview Mirror, Climate Control Module
IGN 0	Brake Transmission Shift Interlock (BTSI), Powertrain Control Module (PCM), Transmission
IGN 3	Rear Heated Seat Module
LCK	Power Door Lock Relay (Lock Function)
LCKS	Liftgate and Rear Door Power Lock Relay Feed
LT DR	Harness Connector (Driver Door)
LT TRLR ST/TRN	Trailer Turn Signal and Stop Lamp (Left)
LT TRN	Turn Signal and Sidemarker Lamps (Left)
RR FOG LP	Not Used
RR Wiper	Rear Window Wiper Switch
RT TRLR ST/TRN	Trailer Turn Signal and Stop Lamp (Right)
RT TRN	Turn Signal and Sidemarker Lamps (Right)
SEO ACCY	Special Equipment Option (SEO) Accessory
TBC 2A	Truck Body Controller (TBC)
TBC 2B
TBC 2C
TBC ACCY	Truck Body Controller Accessory
TBC IGN 0	Truck Body Controller
UNLCK	Power Door Lock Relay (Unlock Function)
VEH CHMSL	Vehicle and Trailer Center High-Mounted Stop Lamp (CHMSL)
VEH STOP	Vehicle Stop Lamps, Brake Module, Electronic Throttle Control (ETC) Module
WS WPR	Windshield Wipers

Fuse Box #2 (Center)

The secondary fuse block is located to the left of the steering column, underneath the instrument panel.

Diagram
Name	Description
BODY	Body Wiring Connector
CB RT DOOR	Power Window Circuit Breaker (Right Rear), Passenger Door Module
CB SEAT	Driver and Passenger Seat Module Circuit Breaker
DEFOG	Rear Window Defogger Relay
HDLNR 1	Headliner Wiring Connector
HDLR 2
INFO	Not Used
SEO	Special Equipment Option (SEO) / Off-Road Lamps Harness Connector
SL RIDE	Suspension Ride Control
SPARE	Not Used
TRAILER	Trailer Brake Wiring
UPFIT	Upfitter

Engine Compartment

There are two fuse blocks located in the engine compartment.

Primary Fuse Block

The primary fuse block is located on the driver's side near the battery, protected by a plastic cover.

General layout.

Diagram
Name	Description
4WS	Not Used
A/C COMP	Air Conditioning (A/C) Compressor Fuse and Relay
ABS	Anti-lock Brake System (ABS)
AIRBAG	Supplemental Inflatable Restraint (SIR) System
AUX PWR	Auxiliary 12V Power Outlet (Console), Cigar Lighter
B/U LP	Automatic Transmission Shift Lock Control System and Reverse Lamps
BLWR	Front Climate Control Blower Motor
BTSI	Brake Transmission Shift Interlock (BTSI) System
CIG LTR	Cigar Lighter
CRNK	Starting System
CUST FEED	Accessory Power Feed
DRL	Daytime Running Lamps (Relay)
EAP	Not Used
ETC/ECM	Electronic Throttle Control (ETC), Electronic Brake Controller
F/PMP	Fuel Pump Relay
FOG LP	Not Used
FRT PARK	Front Parking and Sidemarker Lamps
GLOW PLUG	Not Used
HDLP-HI	High Beam Headlamp Relay
HDLP-LOW	Low Beam Headlamp Relay
HI HDLP-LT	High Beam Headlamp (Left)
HI HDLP-RT	High Beam Headlamp (Right)
HORN	Horn Fuse/Relay
HVAC/ECAS	Climate Control Controller
HYBRID	Not Used
IGN A	Ignition Switch
IGN B
IGN E	Instrument Panel Cluster (IPC), Air Conditioning Relay, Turn Signal/Hazard Flasher Switch, Starter Relay, Electronic Brake Controller TC2 Mode Switch
INFO	OnStar System
INT PARK	Roof Marker Lamps
IPC/DIC	Instrument Panel Cluster (IPC) / Driver Information Center (DIC)
LBEC 1	Left Bussed Electrical Center (LBEC), Left Doors, Truck Body Controller, Turn Signal Flasher Module
LBEC 2	Left Bussed Electrical Center (LBEC), Door Modules, Door Locks, Auxiliary 12V Power Outlets (Rear Cargo Area and Instrument Panel)
LH HID	Not Used
LO HDLP-LT	Low Beam Headlamp (Left)
LO HDLP-RT	Low Beam Headlamp  (Right)
LR PARK	Rear Parking and Sidemarker Lamps (Left)
MBEC 1	Mid-Bussed Electrical Center (MBEC) Power Feed, Front Seats, Right Doors
PARK LP	Parking Lamps Relay
PCM 1	Powertrain Control Module (PCM)
PRIME	Not Used
RADIO	Audio System / Radio
RADIO AMP	Radio Amplifier
RH HID	Not Used
RR DEFOG	Rear Window Defogger
RR PARK	Rear Parking and Sidemarker Lamps (Right)
RR WPR	Rear Window Wiper/Washer
RTD	Electronic Suspension Control, Automatic Level Control (ALC) Exhaust
RVC	Regulated Voltage Control (RVC)
SBA	Not Used
SEO B1	Mid-Bussed Electrical Center (MBEC), Universal Home Remote System, Rear Heated Seats
SEO B2	Off-Road Lamps
SEO IGN	Rear Window Defogger Relay
STOP LP	Stop Lamps
STRTR	Starter Relay
STUD #1	Accessory Power / Trailer Wiring
STUD #2*	Accessory Power / Trailer Wiring Brake Feed
TBC BATT	Truck Body Controller (Battery Feed)
TBC IGN1	Truck Body Controller (Ignition)
TCMB	Transmission Control Module (TCM)
TREC	All-Wheel Drive System
TRL B/U	Trailer Reverse Lamps
TRLPARK	Trailer Parking Lamps
VSES/ECAS	Automatic Level Control (ALC) Compressor
W/S WASH	Windshield and Rear Window Washer Pump
*1 - Fuel Injection Rail #2 (Gasoline Engines) *2 - Fuel Injection Rail #1 (Gasoline Engines)

Auxiliary Fuse Block

Located on the driver’s side, adjacent to the primary fuse block.

Diagram
COOL/FAN 1	Relay 1
COOL/FAN 3	Relay 3
COOL/FAN 2	Relay 2
COOL/FAN	Cooling Fan Fuse