2023 GMC Terrain Fuses and Fuse Box Instructions
Several different parts of the 2023 GMC Terrain are connected to a complex electrical system that makes sure they all work perfectly. The fuses and fuse boxes are very important for keeping the electrical lines safe from faults or overcurrents. The fuse box usually sits in the engine bay or the cabin’s interior. It holds several fuses, each of which protects a different electrical system, like the radio, power windows, or lights. In the event of an electrical problem, the fuses break the circuit to protect the parts or wires from damage. For good maintenance and troubleshooting, you need to know how the fuse box is laid out and how to use it. The owner’s manual for your car has thorough information on where the fuses are located, how much amperage they can handle, and how to replace or check the fuses. When working on your car’s electrical system, you should always be careful and follow safety rules.
Fuses and Circuit Breakers
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.
Danger
Fuses and circuit breakers are marked with their ampere rating. Do not exceed the specified amperage rating when replacing fuses and circuit breakers. The use of an oversized fuse or circuit breaker can result in a vehicle fire. You and others could be seriously injured or killed.
Warning
Installation or use of fuses that do not meet GM’s original fuse specifications is dangerous. The fuses could fail, and result in a fire. You or others could be injured or killed, and the vehicle could be damaged.
See Accessories and Modifications 0 261 and General Information 0 261. To check or replace a blown fuse, see Electrical System Overload
Engine Compartment Fuse Block
There are three clips on the side of the fuse block cover. See Engine Compartment Overview.
To remove the fuse block cover, squeeze the clips on the cover and lift it straight up.
Caution
Spilling liquid on any electrical component of the vehicle may damage it. Always keep the covers on any electrical component
The vehicle may not be equipped with all of the fuses, relays, and features shown.
| Fuses | Usage |
|
F01 |
Starter 1 |
| F02 | Starter 2 |
| F03 |
Lambda Sensor 1/Purge Motor |
|
F04 |
Engine Control Module |
| F05 | Aero Shutter/Water Pump |
| F06 |
Transmission Control Module |
| F07 | – |
| F08 | – |
| F09 | Air Conditioning Clutch |
| F10 | Canister Vent Solenoid |
| F11 | Fuel System |
| F12 | Front Heated Seats |
| F13 | Engine Coolant Pump |
| F14 | – |
| F15 | Lambda Sensor 2 |
| F16 | Ignition Coils |
| F17 | Engine Control Module |
| F18 | Engine Control Module |
| F19 – | – |
| F20 | DC Converter 2 |
| F21 | Shift Control |
| F22 | Antilock Brake Pump |
| F23 | Front/Rear Washer Pump |
| F24 | – |
| F25 | – |
| F26 | – |
| F27 | Antilock Brake Valves |
| F28 | LD Trailer |
| F29 | Rear Window Defogger |
| F30 | Mirror Defroster |
| F31 | – |
| F32 | Variable Functions |
| F33 | – |
| F34 | Horn |
| F35 | – |
| F36 | Headlamps/Daytime Running Lamps Right |
| F37 | – |
| F38 | Automatic Headlamp Leveling |
| F39 | – |
| F40 | – |
| F41 | Transmission Range |
| F42 | Motorized Headlamp Control Module |
| F43 | – |
| F44 | Interior Rearview Mirror |
| F45 | Passenger Side Ventilated Seat |
| F46 | Driver Side Ventilated Seat |
| F47 | Steering Column Lock Assembly |
| F48 | Rear Wiper |
| F49 | – |
| F50 | Heated Steering Wheel |
| F51 | – |
| F52 | Engine Control Module/ Transmission Control |
| F53 | – |
| F54 | – |
| F55 | Front Wiper Speed/ Control |
| F56 | – |
| F57 | Headlamps/Daytime Running Lamps Left |
|
Relays |
Usage |
| K01 | Starter Solenoid |
| K02 | Air Conditioning Control |
| K03 | Engine Control Module |
| K04 | Front Wiper Control |
| K05 | Starter Solenoid 2 |
| K06 | – |
| K07 | – |
| K08 | – |
| K09 | Front Wiper Speed |
| K10 | – |
| K11 | – |
| K12 | Headlamps/Daytime Running Lamps Right |
| K13 | Headlamps/Daytime Running Lamps Left |
| K14 | Run/Crank |
| K15 | Rear Window Defogger |
Instrument Panel Fuse Block
The instrument panel fuse block is under the instrument panel on the driver’s side. To access the fuses, press and release the latch near the top center square. Apply pressure to the two retaining tabs on the sides of the cover, until the two retaining tabs clear the sides of the instrument panel. Allow the panel to move downward and out of the way. To reinstall the cover, reverse the steps. The vehicle may not be equipped with all of the fuses and relays shown.
| Fuses | Usage |
| F01 | DC AC inverter |
| F02 | Front windows |
| F03 | Trailer brake |
| F04 | Heating, ventilation, and air conditioning blower |
| F05 | – |
| F06 | Central gateway module |
| F07 | – |
| F08 | Body control module 3 |
| F09 | Amplifier |
| F10 | – |
| F11 | – |
| F12 | – |
| F13 | – |
| F14 | Electronic shifter |
| F15 | Transmission Control |
| F16 | Front heated seat module |
| F17 | Left data link connector |
| F18 | Body Control Module 7 |
| F19 | Exterior mirror |
| F20 | – |
| F21 | Body control module 4 |
| F22 | – |
| F23 | – |
| F24 | Sensing and diagnostic module |
| F25 | Occupancy sensor |
| F26 | – |
| F27 | Power seats |
| F28 | Rear windows |
| F29 | – |
| F30 | Front heated seats switch |
| F31 | Steering wheel controls |
| F32 | Body Control Module 8 |
| F33 | Heating, ventilation, and air conditioning |
| F34 | Passive entry, passive start |
| F35 | Liftgate latch |
| F36 | Wireless charger module/USB accessory |
| F37 | Cigarette lighter |
| F38 | OnStar |
| F39 | Instrument panel USB |
| F40 | Camera module/Liftgate module |
| F41 | Park assist module/Center stack display/Heating, ventilation, and air conditioner display/ Universal garage door opener/Overhead control switch bank |
| F42 | Radio |
| K01 | – |
| K02 | Retained accessory power |
| K03 | Liftgate |
| K04 | – |
| K05 | – |
| Circuit Breakers | Usage |
| CB1 | – |
| CB2 | – |
Rear Compartment Fuse Block
The rear compartment fuse block is behind a trim panel on the side of the rear compartment. 
Remove the trim plate to access the fuse block. The vehicle may not be equipped with all of the fuses and relays shown.
FAQs
A: The fuse box in the 2023 GMC Terrain is typically located in the engine compartment or under the dashboard on the driver’s side.
A: The 2023 GMC Terrain uses standard blade-type fuses.
A: A blown fuse usually has a broken wire inside. You can visually inspect the fuse or use a multimeter for a more accurate assessment.
A: The fuse box houses electrical fuses that protect various components in the vehicle by breaking the circuit if there is an electrical overload.
A: Yes, there are usually spare fuses included in the fuse box or a designated compartment nearby.
A: It usually involves releasing the latch or removing a cover.
A: No, it’s essential to replace a blown fuse with one of the same amperage to avoid electrical issues or damage to components.
A: Overloaded circuits, short circuits, or faulty electrical components can lead to blown fuses.
A: Regularly inspect the fuses and replace any that are blown. It’s a good practice during routine maintenance.
A: It’s not recommended, as it may damage the electrical system or components. Always replace with the specified amperage fuse.
A: Yes, there is likely a designated fuse for the headlights. Refer to the fuse box diagram.
A: A fuse puller and a multimeter can be handy for checking and replacing fuses.
A: The 2023 GMC Terrain typically has two fuse boxes.
A: Yes, replacing fuses is a relatively simple task.
A: If the problem persists, it’s advisable to consult a professional mechanic or contact the GMC service center for assistance.
Useful Link
View Full PDF: 2023 GMC Terrain User Guide | Auto User Guide