INSTRUMENT PANEL FUSE BLOCKThe instrument panel fuse block is located under driver's side of the instrument panel to the left of the steering column, behind a cover. To identify instrument panel fuse block components, refer to illustration. See Fig. 1 .Fig. 1: Instrument Fuse Block Identification

Fuse & Circuit Breaker Identification1 - Stop/Haz 20 Amp (Yellow): Stop/TCC Switch, Hazard Flasher, Seat Belt Reminder, Stoplights, CHMSL (Center High Mounted Stop Light) 2 - T Case (Not Used): Transfer Case 3 - CTSY 20 Amp (Yellow): Courtesy Lamps, Cargo Lamp, Glove Box Light, Power Mirrors, Dome/Reading Lamps, Vanity Mirrors 4 - Gauges 10 Amp (Red): DRL Relay, DRL Module Buzzer, Headlamp Switch, Keyless Entry, Cluster/Gauges, Low Coolant Module, Convenience Center Electrochromatic Rearview Mirror with Compass 5 - RR HVAC 10 Amp (Red): RR HVAC Controls 6 - Cruise 10 Amp (Red): Cruise Module, Cruise Activator Switch 7 - AUX PWR 25 Amp (Clear): Power Outlets (2) 8 - Crank 10 Amp (Red): Diesel Fuel Pump, DERM ECM (Air Bag), PCM 9 - Park Lamps 20 Amp (Yellow): License Plate Light, Park Lamps, Tail Lamps, Ashtray Lamp, Door Switch Illumination, Headlight ON Warning, Side Marker Fog Lamp Relay, Clearance Lights, Heater & A/C Illumination 10 - Air Bag 10 Amp (Red): DERM (Air Bag) 11 - Wiper 25 Amp (Clear): Windshield Washer/Wiper 12 - HTR-A/C 25 Amp (Clear): L, Ml, M2 Blower, HVAC Indicator Lamp, A/C Compressor, Mode/Temp/Air In Actuator, High Blower Relay, Transfer Case13 - CIG LTR 20 Amp (Yellow): Cigar Lighter, Power Amplifier, Door Lock Relay, Power Lumbar Seat, Rear Liftglass 14 - ILLUM 10 Amp (Red): 4WD Indicator Lamp, Cluster, HVAC Controls, Chime Module, Radio Illumination, Instrument Panel Switches, RR HVAC Controls 15 - DRL-FOG 20 Amp (Yellow): DRL Relay, Fog Lamps 16 - Turn B/U 20 Amp (Yellow): Front Turn, RR Turn, Trailer Turn, Back-up Lamps, BTSI (Brake/Transmission Shift Interlock) Solenoid 17 - Radio 10 Amp (Red): Radio (IGN) 18 - Brake 10 Amp (Red): DRAG, 4WAL/PCM, ABS, Cruise 19 - Radio 10 Amp (Red): Radio (BATT) 20 - Acc/Ign 10 Amp (Red): PRNDL, Auto Transmission, Speedometer, Check Gauges, Tell Tale 21 - Not Used 22 - Not Used 23 - Not Used 24 - 4WD 25 Amp (Clear): 4X4 Models - Front Axle Actuator, 4WD Indicator Lamp, TP2 Relay, Hour Meter (7Y4 Option) A - PWR AGCY 20 Amp - C/K Reg. & Ext. Cab (Circuit Breaker): Power Door Lock, 6 Way Power Seat, Keyless Entry Module 30 Amp - C/K Crew Cab (Circuit Breaker): Power Door Lock, 6 Way Power Seat, Keyless Entry Module B - PWR WDOS: 20 Amp - C/K Reg. & Ext. Cab (Circuit Breaker): Power Windows 30 Amp - C/K Crew Cab (Circuit Breaker): Power Windows

UNDERHOOD FUSE/RELAY CENTERWARNING:Always disconnect battery ground cable before servicing "high-current fuses. It is recommended that "high-current" fuses be replaced by a qualified technician.To identify instrument panel fuse block components, refer to illustration. See Fig. 2 .Fig. 2: Underhood Fuse/Relay Center IdentificationCourtesy of GENERAL MOTORS CORP.Fuse & Relay Identification1 - Spare 2 - STOP 30 Amp Maxifuse (Green) Stop Lamps 3 - A/C 50 Amp Maxifuse (Red) High Blower Relay, Rear Blower Relay 4 - ABS 60 Amp Maxifuse (Blue) ABS Module 5 - IGN B 50 Amp Maxifuse (Red) 50 Amp IGN B Switch, Go To Fuse Block Busbar 6 - IGN A 40 Amp Maxifuse (Amber) IGN A Switch, Go To Fuse Block Busbar 7 - BATTERY 50 Amp Maxifuse (Red) Battery, Fuse Block Busbar 8 - LIGHTING 50 Amp Maxifuse (Red) Headlamp & Panel Dimmer Switch, Fog Lights, Courtesy Lights 9 - 30 Amp (Green) 10 - 30 Amp (Green) 11 - 10 Amp (Red) Spare 12 - 20 Amp (Yellow) Spare 13 - 30 Amp (Green) Spare 14 - Not Used 15 - A/C COMP 10 Amp (Red) SW A/C Pressure to A/C Clutch 16 - HORN 20 Amp (Yellow) Horn, Underhood Lamps 17 - ECM B 20 Amp (Yellow) Fuel Pump, PCM 18 - Not Used 19 - AUX FAN 30 Amp (Green) Aux. Fan 20 - RR- DEFOG 30 Amp (Green) RR DEFOG 21 - ENG 120 Amp (Yellow) IGN A Switch to Engine Loads, EGR, Canister Purge EVRV Idle Coast Solenoid, Heated 02 Sensor, Fuel Heater, Water Sensor 22 - ECM 120 Amp (Yellow) Injector #l, Injector #2, PCM 23 - FUEL SOL 20 Amp (Yellow) Fuel Solenoid (Diesel Engine Only) 24 - Not Used 25 - Not Used 26 - IGN E 10 Amp (Red) Aux Fan Relay Coil, Hot Fuel Module 27 - Not Used 28 - Not Used 29 - GLOW PLUGS 10 Amp (Red) Glow Plugs (Diesel Engine Only) 30 - Not Used 31 - Not Used 32 - Not Used A - 30 Amp B - 30 Amp UY1, UY7 Camper/Trailer Wiring C - Brake Lamp Relay D - Horn Relay E - Auxiliary Fan Relay F - A/C Relay G - Fuel Pump Relay

CONVENIENCE CENTERFig. 3: Convenience CenterCourtesy of GENERAL MOTORS CORP.Fuse & Circuit Breaker IdentificationA - Fog Lamp Relay B - DRL (Daytime Running Lights) Relay C - Hazard Flasher D - Chime