2021 Chevrolet Colorado Owners Manual - Electrical System

Electrical System

The vehicle has fuses to protect against an electrical system overload. Fuses also protect power devices in the vehicle.

Replace a bad fuse with a new one of the identical size and rating.

If there is a problem on the road and a fuse needs to be replaced, there is a fuse puller in the Engine Compartment Fuse Block.

Replace the fuse as soon as possible with one of the same amperage rating.

An electrical overload may cause the lamps to go on and off, or in some cases to remain off. Have the headlamp wiring checked right away if the lamps go on and off or remain off.

If the wiper motor overheats due to heavy snow or ice, the windshield wipers will stop until the motor cools and will then restart.

Although the circuit is protected from electrical overload, overload due to heavy snow or ice may cause wiper linkage damage. Always clear ice and heavy snow from the windshield before using the windshield wipers.

If the overload is caused by an electrical problem and not snow or ice, be sure to get it fixed.

The wiring circuits in the vehicle are protected from short circuits by a combination of fuses and circuit breakers. This greatly reduces the chance of damage caused by electrical problems.

To check a fuse, look at the silver-colored band inside the fuse. If the band is broken or melted, replace the fuse. Be sure to replace a bad fuse with a new one of the identical size and rating.

Fuses of the same amperage can be temporarily borrowed from another fuse location, if a fuse goes out. Replace the fuse as soon as possible.

If the vehicle has a diesel engine, see the Duramax diesel supplement.

The engine compartment fuse block is in the engine compartment, on the driver side of the vehicle. See Engine Compartment Overview 0 240

Lift the cover to access the fuse block.

A fuse puller is available inside this fuse block.

The vehicle may not be equipped with all of the fuses, relays, and features shown.

Fuses Usage

F1 Traction control module power

F2 Engine control module power

F3 Air conditioning clutch

F4 –

F5 Engine control module ignition/Integrated chassis control module/ Fuel pump power module

F6 Wipers

F7 Cargo lamp/Bed lighting

F8 Fuel injectors – even

F9 Fuel injectors – odd

F10 Engine control module 1

F11 Oxygen/Mass air flow/ Humidity/Induction air temperature/Throttle inlet pressure sensors

F12 Starter

Fuses Usage

F13 Traction control module

F14 –

F15 –

F16 –

F17 Front axle actuator

F18 –

F19 Aeroshutters

F20 –

F21 Front blower

F22 Antilock brake system valves

F23 –

F24 Trailer

F25 Transfer case electronic control

F26 Antilock brake system pump

F27 Trailer brake control module/Trailer wiring

F28 Rear window defogger

F29 –

Fuses Usage

F30 Driver heated seat

F31 –

F32 Passenger heated seat

F33 Right headlamp low beam/Front right park lamp/Right front side marker/Right rear side marker

F34 Fuel pump power module

F35 Integrated chassis control module

F36 Center high-mounted stoplamp

F37 Right high-beam headlamp

F38 Left high-beam headlamp

F39 Rear differential lock actuators

F40 Front differential lock actuators

F41 –

The instrument panel fuse block is behind the passenger side cowl side trim panel. Remove the plastic nut at the front of the cover, then pull the cover away from the trim panel to access the fuse block.

The vehicle may not be equipped with all of the fuses, relays, and features shown.

Fuses Usage

F1 Run/Crank relay control/ Horn switch/Dome lamps

Fuses Usage

F2 –

F3 –

F4 Steering wheel controls

F5 Left headlamp low beam/ Front left park lamp/Left front side marker/Left rear side marker

F6 –

F7 –

F8 Mirror window module

F9 Instrument panel

F10 –

F11 Door latches

F12 –

F13 OnStar/HVAC

F14 Radio/Infotainment

F15 RAP accessory relay control/Shifter control/ Shifter solenoid/Wiper relay control/Washer pump relay control/Rear defog relay control

Fuses Usage

F16 Communication gateway module

F17 Left rear side marker/Right front turn lamp/Left rear stop lamp/Left front turn lamp/Right rear stop lamp

F18 Airbag/Sensing and diagnostic module/ Automatic occupant sensing module

F19 –

F20 Amplifier

F21 –

F22 –

F23 Data link connector/USB front

F24 HVAC ignition/Auxiliary heater

F25 Driver door latch

F26 –

F27 –

Fuses Usage

F28 Instrument panel/ Automatic occupant sensing display

F29 Rear vision camera/Transfer case control module (4WD)/Inside rear view mirror

F30 –

F31 Front camera/Rear park assist

F32 Steering wheel controls backlighting

F33 Heated steering wheel/ Communication gateway module ignition

F34 Front ventilated seats

F35 Park/Reverse/Neutral/ Drive/Low display/Wireless charging module/USB rear

F36 Discrete logic ignition sensor

F37 –

F38 –

F39 Auxiliary power outlet 2

Fuses Usage

F40 –

F41 Auxiliary power outlet 1/ Cigarette lighter

F42 Left power window

F43 Driver power seat

F44 Auxillary power outlet

F45 Right power window

F46 Passenger power seat

Relays Usage

K1 Retained accessory power

K2 Run/Crank

K3 –

warranty and where to get service. For additional information refer to the tire manufacturer.