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/Tum/Hazard Lamps, CHMSL, Chime Module |
2 | — |
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, EVO Module, Interior Lamps Module |
5 | — |
6 | Cruise Module, Cruise Control Switch |
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, MI, M2 Blower Motor, Rear A/C Relay Coil, Front Cont. Temp. Door Motor, Hi Blower Relay, Defogger Timer Coil |
13 | Cigar 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 Console |
15 | DRL Diode |
16 | Front Turn Signals, Rear Turn Signals, Trailer Turn Signals, Back-up Lamps, BTSI Solenoid |
17 | Radio: ATC (Standby), 2000 Series (Main Feed), Rear Seat Audio Controls |
18 | VCM-Ign 3, VCM- Brake, 4WAL, Cruise Stepper Motor |
19 | Radio: ATC (Main Feed), 2000 Series (Standby) |
20 | PRNDLI Odometer, TCC Enable and PWM Solenoids, Shift A and Shift B Solenoids, 3-2 Downshift Solenoids |
21 | — |
22 | Security/Steering Module |
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.
Feef | Usage |
AUX B | Upfitter Battery Feed |
AUX A | Upfitter Accessory Feed |
Relays |
A/C Relay (Rear Heat and A/C) |
Upfitter Accessory Relay |
Starter Enable Relay |
A/C Enable Relay |
Export Only Relay |
Fuel Pump Relay |
Fuse/Circuit Breaker | Usage |
UPFITTER-BATT | Upfitter Battery Power Stud, Trailer Wiring Harness |
UPFITTER-ACCY | Upfitter Accessory Relay |
Spare | — |
Fuse Puller* | |
Spare | — |
Spare | — |
ECM-B | Fuel Pump Relay, VCM, Oil Pressure Switch/Sender |
HORN | Horn Relay and Horn |
A/C COMP | A/C Enable Relay and Compressor |
RR DEFOG | Heater-A/C Control Selector Switch, Rear Window Defogger |
ENG-I | Oxygen Sensors, Camshaft Position Sensor, Mass Air Flow Sensor, Evaporative Emission CanistePr urge 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 | SteeringBecurity Fuse, Courtesy Fuse, ACSY CB, Stop/Hazard Fuse, Auxiliary Power Fuse, Cigar 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 |
Spare | Not Used |
* 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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