In this article you will find a description of fuses and relays Chevrolet,
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.
Instrument Panel Fuse Block
The fuse block is located on the lower portion of the instrument panel on the driver’s side.
Fuses/Circuit Breaker | Usage |
1 | Stop/Turn/Hazard Lamps, CHMSL, Chime Module |
2 | Heated Mirror (Not Used) |
3 | Courtesy Lamps, Power Outside Mirrors, Glove Box Lamp, Dome Reading Lamps, Vanity Mirror Lamps |
4 | DRL Relay, DRL Module, Chime Headlamp Switch, Keyless Entry, Cluster, Overhead Console, Interior Lamps Module |
5 | Rear Defogger |
6 | Cruise Module, Cruise Control Switch, Electrochromic Mirror |
7 | Power Outlets, DLC, Subwoofer Amplifier |
8 | Starter Enable Relay |
9 | License Plate Lamp, Taillamps, Parking Lamps, Ashtray Lamp, Panel Lights, Trailer Taillamps, Front and Rear Sidemarker Lamps, Door Switch Illumination, Headlamp Switch Illumination, Rear Seat Audio Illumination |
10 | Air Bag System |
11 | Wiper Motor, Washer Pump, Upfitter Relay Coil |
12 | L, M1, M2 Blower Motor, Rear A/C Relay Coil, Front Cont. Temp. Door Motor, HI Blower Relay, Defogger Timer Coil |
13 | Cigarette Lighter, Door Lock Switches, Dutch Door Release Module |
14 | Cluster Illum, HVAC Controls, Chime Module, Radio Illumination, Rear Heat Switch Illumination, Rear Wiper/Washer Switch Illumination, Rear Liftgate Switch Illumination, Remote Cassette Illumination, O/H Consol |
15 | DRL Lamps |
16 | Front Turn Signals, Rear Turn Signals, Trailer Turn Signals, Back-up Lamps, BTSI Solenoid |
17 | 2000 Series (Main Feed), Rear Seat Audio Controls |
18 | VCM-Ign 3, VCM-Brake, 4WAL, Cruise Stepper Motor Signal |
19 | Radio: ATC (Main Feed), 2000 Series (Standby) |
20 | PRNDL/ Odometer, TCC Enable and PWM Solenoid, Shift A and Shift B Solenoids, 3-2 Downshift Solenoid |
21 | Security |
22 | — |
23 | Rear Wiper, Rear Washer Pump |
24 | — |
A | (Circuit Breaker) Power Door Lock Relay, 6-way Power Seat, Remote Control Door Lock Receiver, Dutch Door Module, Dutch Door Release |
B | (Circuit Breaker) Power Windows |
Underhood Fuse Block
The underhood fuse block is located toward the rear of the engine compartment on the driver’s side of the vehicle.
Feed | Usage |
AUX B | Upfitter Battery Feed |
AUX A | Upfitter Accessory Feed |
Relays |
A/C Relay (Rear Heat and A/C) |
Upfitter ACCY Relay |
Starter Enable Relay |
A/C Enable Relay |
Fuel Pump Relay |
Fuse/Circuit Breaker | Usage |
UPFITTER-BATT | Upfitter Battery Power Stud. Trailer Wiring Harness |
UPFITTER-ACCY | Upfitter Accessory Relay |
Spare | — |
Spare | — |
Spare | — |
ECM-1B | Fuel Pump Relay and Motor, VCM oil Pressure Switch/Sender |
HORN | Horn Relay and Horn |
A/C COMP | A/C Enable Relay and Compressor |
ATC | Active Transfer Case-L Van |
ENG-I | Oxygen Sensors, Camshaft Position Sensor, Mass Air Flow Sensor, Evaporative Emission Canister Purge Solenoid, Linear EGR Valve Solenoid, VCM EGR HI |
IGN-E | A/C Enable Relay Coil |
ECM-I | Fuel Injectors 1-6, Crankshaft Position Sensor, VCM, Coil Driver Module (EST) |
LIGHTING | Park Lamps Fuse, DRL Fuse, Headlamp and Panel Dimmer Switch |
BATT | Steering/Security Fuse, Courtesy Fuse, ACSY CB, Stop/Hazard Fuse, Auxiliary Power Fuse, Cigarette Lighter Fuse, Radio Battery Fuse |
IGN A | Starter Relay, Ignition Switch |
IGN B | Ignition Switch |
ABS | Electronic Brake Control Module |
A/C | Blower Motor Resistor, Blower Relay |
RR HTR/AC | Auxiliary Heater, A/C Relay |
HTD MIR/RR DEFOG | Rear Window Defogger |
*A fuse puller is included in the underhood electrical center. You will also find spare fuses. |
WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.
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