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GMC Sierra mk1 (1999 - 2000) - fuse box diagram

avatar Jonathan Yarden Mar 25, 2021 · 5 min. read

In this article you will find a description of fuses and relays GMC, with photos of block diagrams and their locations. Highlighted the cigarette lighter fuse (as the most popular thing people look for).
Get tips on blown fuses, replacing a fuse, and more.

Year of production: 1999, 2000

 

Instrument 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.

GMC Sierra mk1 - fuse box - instrument panel

Fuse/Circuit Breaker Usage
1 Stop/TCC Switch, Buzzer, CHMSL, Hazard Lamps, Stoplamps
2 Transfer Case
3 Courtesy Lamps, Cargo Lamp, Glove Box Lamp, Dome/Reading Lamps, Vanity Mirrors, Power Mirrors
4 Instrument Cluster, DRL Relay, Lamp Switch, Keyless Entry, Low Coolant Module, Illuminated Entry Module, DRAC (Diesel Engine)
5 Not Used
6 Cruise Control
7 Auxiliary Power Outlet
8 Crank
9 License Lamp, Parking Lamps, Taillamps, Roof Marker Lamps, Tailgate Lamps, Front Sidemarkers, Fog Lamp Relay, Door Switch Illumination, Fender Lamps, Headlamp Switch Illumination
10 Not Used
11 Wiper Motor, Washer Pump
12 A/C, A/C Blower, High Blower Relay
13 Power Amp, Cigarette Lighter, Door Lock Relay, Power Lumbar Seat
14 4WD Indicator, Cluster, Comfort Controls, Instrument Switches, Radio Illumination, Chime Module
15 DRL Relay, Fog Lamp Relay
16 Front and Rear Turn Signals, Back-Up Lamps, BTSI Solenoid
17 Radio (Ignition)
18 4WAL/VCM, ABS, Cruise Control
19 Radio (Battery)
20 PRNDL, Automatic Transmission, Speedometer, Check Gages Warning Light
21 Security/Steering
22 Not Used
23 Not Used
24 Front Axle, 4WD Indicator Lamp, TP2 Relay (Gasoline Engine)
A Power Door Lock, Six-Way Power Seat, Keyless Entry Module
B Power Windows

Underhood Fuse/Relay Center

The underhood fuse/relay center is located in the rear of the engine compartment near the brake fluid reservoir.

GMC Sierra mk1 - fuse box - engine compartment

Name Usage
ECM-B Fuel Pump, PCM/VCM
RR DEFOG Rear Window Defogger
IGN-E Auxiliary Fan Relay Coil, A/C Compressor Relay, Hot Fuel Module, Dual Tanks
HORN Horn, Underhood Lamps
AUX FAN Auxiliary Fan
ECM-1 Injectors, PCM/VCM, Fuel Solenoid (Diesel Engine, Fuel Control Module (Diesel Engine)
HTD ST-FR Not Used
A/C Air Conditioning
HTD MIR Not Used
ENG-1 Ignition Switch, EGR, Canister Purge, EVRV Idle Coast Solenoid, MAF, Heated O2, Fuel Heater (Diesel Engine), Water Sensor (Diesel Engine), Boost Solenoid (Diesel Engine), EPR (Diesel Engine)
HTD ST-RR Not Used
LIGHTING Headlamp and Panel Dimmer Switch, Fog and Courtesy Fuses
BATT Battery, Fuse Block Busbar
IGN-A Ignition Switch
IGN-B Ignition Switch
ABS Anti-Lock Brake Module
BLOWER High Blower Relay
STOP/HAZ Stoplamps
HEATED SEATS Not Used

WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.

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