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UNDERHOOD Fuse Block

Underhood fuse block is located on driver's side inner fender in the engine compartment. See Figure.

Fig 1: Identifying Underhood Fuse Block Components
G00310264Courtesy of GENERAL MOTORS CORP.
FUSE IDENTIFICATION LEGEND (ENGINE COMPARTMENT FUSE BLOCK)

Fuses Rating Description
ABS 2 30A EBTCM
ABS1 30A EBTCM
AC 10A Fuse Block - Underhood AC Relay
AUX POWER 20A Auxiliary Power Outlet
BACKUP/TURN 10A Hazard Switch, HEADLAMP Relay (Fuse Block - I/P Left), and PNP Switch
BRAKE 15A Stop Lamp Switch
BCM/ECM/CRUISE 10A ABS/Traction Control Module, BCM, Cruise/Brake Switch, ECM, and Fuse Block - Underhood CRUISE SWITCH Fuse
BCM 2 10A BCM
BCM CLUSTER 15A BCM, Dimmer/Rear Compartment Lid Release Switch, and IPC
COOL FAN 2 30A Cooling Fan Control Module
COOL FAN 1 30A Cooling Fan Control Module
CONTROLS IGN 1 10A TCM
CONTROLS B+ 10A ECM and TCM
CRUISE SW 2A Cruise On/Off Switch (Via Inflatable Restraint Steering Wheel Module Coil)
CD/DLC 15A DLC
ENGINE CNTL 1 (V6) 10A EVAP Canister Purge Solenoid, HO2S Bank 2 Sensor 1, HO2S Bank 1 Sensor 2, MAF Sensor and Fuse Block - Underhood AC Relay
ENGINE CNTL 2 (V6) 10A Fuel Injectors 1-6 and IMRC Solenoid
ENGINE CNTL 3 (V6) 10A ECM, HO2S Bank 1 Sensor 1, HO2S Bank 2 Sensor 2, and Fuse Block - Underhood FUEL PUMP Relay
FUEL PUMP 15A Fuse Block - Underhood FUEL PUMP Relay
HVAC BLOWER 40A Fuse Block - I/P Left IGN 3 Relay
HORN 10A HORN Relay
HAZARD 15A Hazard Switch
IGN 0/3/CR 30A Ignition Switch
IGN 1/2 30A Ignition Switch
INJECTOR (L4) 10A Not Used
IGN (V6) 15A ICM Bank 1 and ICM Bank 2
IGN 0 10A PNP Switch
IGN 1 10A Coolant Level Switch, IPC, and SDM
IP BATT RT 30A Fuse Block - I/P Right BODY, DOOR LOCKS, FOG LAMP, POWER SEAT, and PREM AMP Fuses
LT HEADLAMP 10A DRL Relay and Headlamp Assembly - Left
LIGHTER 20A Cigar Lighter
PARK LAMP 10A PARK LAMP Relay (Fuse Block - I/P Left)
RT HEADLAMP 10A Headlamp Assembly - Right
RADIO 10A Radio
REAR DEFOG 25A Fuse Block - I/P Left REAR DEFOG Relay
WDO/SUNRF (Circuit Breaker) 30A Sunroof Module and Fuse Block - I/P Right WINDOW Relay
RELAY IDENTIFICATION LEGEND (ENGINE COMPARTMENT FUSE BLOCK)

Relay Description Circuits
AC Relay A/C Compressor Clutch and Fuse Block - Underhood A/C Diode
DRL Relay Headlamp - Left - Low Beam, Headlamp - Right - Low Beam, and Headlamp/Turn Signal Switch
FUEL PUMP Relay Fuel Pump Motor
HORN Relay Horn
REAR WIPER Relay Not Used
WIPER Relay Windshield Wiper/Washer Switch
IDENTIFYING DIODE (ENGINE COMPARTMENT FUSE BLOCK)

Device Description
A/C Diode A/C Compressor Clutch Ground Circuit