Where are the Fuse Boxes located in the 2001 GMC Sierra?

2001 GMC Sierra has 2 main boxes with fuses and relays. One is in the cabin (Passenger Compartment) and another is under the hood (Engine Compartment).

2001 GMC Sierra Under Dash Fuse Box and Relay Location 

The Fuse and Relay box is located under the dashboard, on the driver side, below the steering, and is covered with trim.

2001 GMC Sierra Under Dash Fuse Box Layout

2001 GMC Sierra Dash Fuse and relay Box Diagram

Instrument Panel Fuse Block

The instrument panel fuse block access door is located on the driver side edge of the instrument panel.

2001 GMC Sierra Under Dash Fuse and relay Box Details

Assignment of the fuses in the Instrument Panel Fuse Block

L BODYRetained Accessory Power Relay
LOCKPower Door Locks
DRV UNLOCKPower Door Lock Relay
LOCKPower Door Lock Relay
HVAC1Climate Control System
CRUISECruise Control, Instrument Panel Cluster
IGN 3Ignition, Power Seats
4WDFour-Wheel Drive System, Auxiliary Battery
CRANKStarting System
INT PRKParking Lamps, Sidemarker Lamps, Interior Lamps
LDOORPower Door Lock Relay
BRAKEAnti-Lock Brake System
ILLUMInterior Lamps
SEATPower Seat Circuit Breaker
TURNExterior Lamps, Turn Signals, Hazard Lamps
UNLOCKPower Door Locks
HTR A/CClimate Control System
WSWPRWindshield Wipers
IGN 1Ignition, Instrument Panel
MIR/LOCKPower Mirrors, Power Door Locks
DR LOCKPower Door Locks
PWR WDOPower Window Circuit Breaker
UNLOCKPower Door Lock Relay
IGN 0PRND321 Display, Odometer, PCM
SEO IGNSpecial Equipment Option, Ignition, Manual Selectable Ride
SEO ACCYSpecial Equipment Option Accessory, Cellular Telephone
RAP #1Retained Accessory Power Relay
RDO 1Audio System
RAP #2Not Used

Center Instrument Panel Block

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

Assignment of the fuses in the Center Instrument Panel Fuse Block

SEOSpecial Equipment Option
HTD STHeated Seats
SPARE 4Not Used
VANITYHeadliner Wiring
TRAILERTrailer Brake Wiring
PWR STPower Seats
SPARE 5Not Used
CLUTCHManual Transmission Clutch Switch
PARK LAMPParking Lamps (Relay)
FRT PRK EXPTNot Used (Fuse)
SL RIDEManual Selectable Ride Switch
SPARE 2Not Used
RR PRK LPNot Used (Relay)
RR FOG LPNot Used (Relay)
SPARE 3Not Used
IN ADV PWRInterior Lights Feed
CTSYLPCourtesy Lamps
CEL PHONECellular Telephone Wiring

2001 GMC sierra Under Hood Fuse and Relay box location 

The fusebox is located in the engine compartment, on the driver’s side of the vehicle.

2001 GMC Sierra Under Hood Fuse Box Layout

2001 GMC Sierra under Hood Fuse and relay Box Diagram

2001 GMC Sierra under Hood Fuse Box Details

Assignment of the fuses in the Engine compartment

GLOW PLUGDiesel Glow Plugs and Intake Air Heater
CUST FEEDGasoline Accessory Power
STUD #1Accessory Power/Trailer Wiring Feed
ABSAnti-Lock Brakes
IGN AIgnition Switch
AIRA I R System
RAP #1Retained Accessory Power, Power Mirrors, Power Door Locks, Power Seat(s)
IGNBIgnition Switch
RAP #2Not Used
STUD #2Accessory Power/Trailer Wiring Brake Feed
SPARESpare Fuse
TRLR TRNRight Turn Signal Trailer Wiring
TRLL TRNLeft Turn Signal Trailer Wiring
IGN 1Ignition, Fuel Controls (Relay)
INJ BIgnition, Fuel Controls
STARTERStarter (Relay)
PARK LPParking Lamps
FRT HVACClimate Control System
STOP LPExterior Lamps, Stoplamps
ECMRPVFuel Controls, ECM
CHMSLCenter High Mounted Stoplamp
VEH STOPStoplamps, Cruise Control
TRL B/UBackup Lamps Trailer Wiring
INJ AFuel Controls, Ignition
VEH B/UVehicle Backup Lamps
ENG 1Engine Controls, Canister Purge, Fuel System
ETCElectronic Throttle Control
IGNEA/C Compressor Relay, Rear Window Defogger, Daytime Running Lamps, A I R. System
B/U LPBackup Lamps, Automatic Transmission Shift Lock Control System
ATCAutomatic Transfer Case
RR DEFOGRear Window Defogger, Heated Mirrors (Relay)
RR PRKRight Rear Parking Lamps
F/PMPFuel Pump (Relay)
O2 AOxygen Sensors
FUEL HTFuel Heater, Glow Plug and Intake Heater Controls
O2 BOxygen Sensors
LR PRKLeft Rear Parking Lamps
RR DEFOGRear Window Defogger, Heated Mirors
HDLPHeadlamps (Relay)
TRL PRKParking Lamps Trailer Wiring
RT HDLPRight Headlamps
DRLDaytime Running Lamps (Relay)
HTD MIRHeated Mirrors
LT HDLPLeft Headlamps
A/CAir Conditioning
AUX PWRCigarette Lighter, Auxiliary Power Outlets
SEO 2Special Equipment Option Power, Power Seats, Aux Roof Mnt Lamp
SEO 1Special Equipment Option Power, Aux Roof Mnt Lamp, Cell Phone, OnStarO
DRLDaytime Running Lamps
A/CA/C (Relay)
FOG LPFog Lamps
FOG LPFog Lamps (Relay)
RADIOAudio System, Instrument Cluster, Climate Control System
CIGARCigarette Lighter, Auxiliary Power Outlets
RT TURNRight Turn Signals
BTSIAutomatic Transmission Shift Lock Control System
LT TURNLeft Turn Signals
FR PRKFront Parking Lamps, Sidemarker Lamps
W/WPMPWindshield Washer Pump
HORNHorn (Relay)
IGNCIgnition Switch, Fuel Pump, PRND321 Display, Crank
HAZ LPExterior Lamps, Hazard Lamps
CTSYLPInterior Lamps
TBCBody Control Module, Remote Keyless Entry, Headlamps
*1INJ B – Gasoline Engine and Diesel Engine.
*2ECM I – Gasoline Engine; ECMRPV – Diesel Engine.
*3O2 A – Gasoline Engine; FUEL HT – Diesel Engine.
*4O2 B – Gasoline Engine; ECM l – Diesel Engine.

Auxiliary Fuse Box(Engine Compartment)

The auxiliary electric cooling fan fuse block is located in the engine compartment on the driver’s side of the vehicle next to the underhood fuse block.

Assignment of the fuses in the Engine compartment auxiliary box

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

WARNING: The terminal and harness assignments for individual connectors may vary depending on the vehicle’s equipment level, model, and market. It is recommended to refer to the fuse box diagram provided at the back of the fuse box cover for accurate information.

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