Jonathan Yarden Mar 25, 2021 · 5 min. read
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 instrument panel fuse block access door is located on the driver’s side edge of the instrument panel.
Fuses |
Usage |
1 |
Rear Seats |
2 |
Rear Accessory Power Outlet |
3 |
Steering Wheel Controls Backlight |
4 |
Driver Door Module |
5 |
Dome Lamps, Driver’s Side Turn Signal |
6 |
Driver’s Side Turn Signal, Stoplamp |
7 |
Instrument Panel Back Lighting |
8 |
Passenger’s Side Turn Signal, Stoplamp |
9 |
Passenger Door Module, Universal Home Remote System |
10 |
Power Door Lock 2 (Unlock Feature) |
11 |
Power Door Lock 2 (Lock Feature) |
12 |
Stoplamps, Center-High Mounted Stoplamp |
13 |
Rear Climate Controls |
14 |
Not Used |
15 |
Body Control Module (BCM) |
16 |
Accessory Power Outlets |
17 |
Interior Lamps |
18 |
Power Door Lock 1 (Unlock Feature) |
19 |
Rear Seat Entertainment |
20 |
Ultrasonic Rear Parking Assist, Power Liftgate |
21 |
Power Door Lock 1 (Lock Feature) |
22 |
Driver Information Center (DIC) |
23 |
Rear Wiper |
24 |
Not Used |
25 |
Driver Seat Module, Remote Keyless Entry System |
26 |
Not Used |
Harness Connector |
Usage |
LT DR |
Driver’s Door Harness Connection |
BODY |
Harness Connector |
BODY |
Harness Connector |
Center Instrument Panel Utility Block
The center instrument panel fuse block is located underneath the instrument panel, to the left of the steering column.
Harness Connector |
Usage |
BODY 2 |
Body Harness Connector 2 |
BODY 1 |
Body Harness Connector 1 |
BODY 3 |
Body Harness Connector 3 |
HEADLINER 3 |
Headliner Harness Connector 3 |
HEADLINER 2 |
Headliner Harness Connector 2 |
HEADLINER 1 |
Headliner Harness Connector 1 |
BRAKE CLUTCH |
Brake Clutch Harness Connector |
SEO/UPFITTER |
Special Equipment Option Upfitter Harness Connector |
Circuit Breaker |
Usage |
CB1 |
Passenger’s Side Power Window Circuit Breaker |
CB2 |
Passenger’s Seat Circuit Breaker |
CB3 |
Driver’s Seat Circuit Breaker |
CB4 |
Rear Sliding Window |
Underhood Fuse Block
The underhood fuse block is located in the engine compartment, on the driver’s side of the vehicle.
Fuses |
Usage |
1 |
Right Trailer Stop/Turn Lamp |
2 |
Electronic Stability Suspension Control, Automatic Level Control Exhaust |
3 |
Left Trailer Stop/Turn Lamp |
4 |
Engine Controls |
5 |
Engine Control Module, Throttle Control |
6 |
Trailer Brake Controller |
7 |
Front Washer |
8 |
Oxygen Sensors |
9 |
Anti-lock Brakes System 2 |
10 |
Trailer Back-up Lamps |
11 |
Driver’s Side Low-Beam Headlamp |
12 |
Engine Control Module (Battery) |
13 |
Fuel Injectors, Ignition Coils (Right Side) |
14 |
Transmission Control Module (Battery) |
15 |
Vehicle Back-up Lamps |
16 |
Passenger’s Side Low-Beam Headlamp |
17 |
Air Conditioning Compressor |
18 |
Oxygen Sensors |
19 |
Transmission Controls (Ignition) |
20 |
Fuel Pump |
21 |
Fuel System Control Module |
22 |
Headlamp Washer |
23 |
Rear Windshield Washer |
24 |
Fuel Injectors, Ignition Coils (Left Side) |
25 |
Trailer Park Lamps |
26 |
Driver’s Side Park Lamps |
27 |
Passenger’s Side Park Lamps |
28 |
Fog Lamps |
29 |
Horn |
30 |
Passenger’s Side High-Beam Headlamp |
31 |
Daytime Running Lamps (DRL) |
32 |
Driver’s Side High-Beam Headlamp |
33 |
Daytime Running Lamps 2 |
34 |
Sunroof |
35 |
Key Ignition System, Theft Deterrent System |
36 |
Windshield Wiper |
37 |
SEO B2 Upfitter Usage (Battery) |
38 |
Electric Adjustable Pedals |
39 |
Climate Controls (Battery) |
40 |
Airbag System (Ignition) |
41 |
Amplifier |
42 |
Audio System |
43 |
Miscellaneous (Ignition), Cruise Control |
44 |
Liftgate Release |
45 |
Airbag System (Battery) |
46 |
Instrument Panel Cluster |
47 |
Power Take-Off |
48 |
Auxiliary Climate Control (Ignition), Compass-Temperature Mirror |
49 |
Center High-Mounted Stoplamp (CHMSL) |
50 |
Rear Defogger |
51 |
Heated Mirrors |
52 |
SEO B1 Upfitter Usage (Battery) |
53 |
Cigarette Lighter, Auxiliary Power Outlet |
54 |
Automatic Level Control Compressor Relay, SEO Upfitter Usage |
55 |
Climate Controls (Ignition) |
56 |
Engine Control Module, Secondary Fuel Pump (Ignition) |
J-Case Fuse |
Usage |
60 |
Cooling Fan 1 |
61 |
Antilock Brake System 1 |
62 |
Starter |
63 |
Stud 2 (Trailer Brakes) |
64 |
Left Bussed Electrical Center 1 |
65 |
Electric Running Boards |
66 |
Heated Windshield Washer System |
67 |
Four-Wheel Drive System |
68 |
Stud 1 (Trailer Connector Battery Power) |
69 |
Mid-Bussed Electrical Center 1 |
70 |
Climate Control Blower |
71 |
Power Liftgate Module |
72 |
Left Bussed Electrical Center 2 |
Relays |
Usage |
FAN HI |
Cooling Fan High Speed |
FAN LO |
Cooling Fan Low Speed |
ENG EXH VLV |
Not Used |
FAN CNTRL |
Cooling Fan Control |
HDLP LO/HID |
Low-Beam Headlamp |
FOG LAMP |
Air Conditioning Compressor |
STRTR |
Starter |
PWR/TRN |
Powertrain |
FUEL PMP |
Fuel Pump |
PRK LAMP |
Parking Lamps |
REAR DEFOG |
Rear Defogger |
RUN/CRANK |
Switched Power |
WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.
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