Repair Fuses: 2019 GMC Terrain Relay and Fuse Diagrams
Fuse and switches are two of these important parts that are often forgotten but are needed to keep many systems in your 2019 GMC Terrain safe. If you know a lot about the relay and fuse designs, you can quickly fix electrical problems and make sure your car runs safely and smoothly. It takes a detailed guide to find your way around the complicated network of fuses and switches, whether it’s an accessory that doesn’t work or a more serious electrical problem. By going into great detail about how to fix fuses in your 2019 GMC Terrain and giving you a full rundown of its switch and fuse diagrams, this article gives you all the information you need to effectively troubleshoot and fix electrical problems.
2023 – 2024 GMC TERRAIN Review, Price, Features and Mileage (Brochure)
Electrical System
Electrical System Overload
The vehicle has fuses and circuit breakers to protect against an electrical system overload. When the electrical load current is too heavy, the circuit breaker opens and closes, protecting the circuit until the current load returns to normal or the problem is fixed. This greatly reduces the chance of circuit overload and fire caused by electrical problems. 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, the same amperage fuse can be borrowed. Choose some feature of the vehicle that is not needed to use and replace it as soon as possible.
Headlamp Wiring
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.
Windshield Wipers
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.
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. Use of an oversized fuse or circuit breaker can result in a vehicle fire. You and others could be seriously injured or killed.
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. There is a fuse puller in the engine compartment fuse block. It can be used to easily remove fuses from the fuse block.
Engine Compartment Fuse Block
To remove the fuse block cover, squeeze the clips on the cover and lift it straight up.
Caution
Spilling liquid on any electrical component on 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.
| Fuse | Usage |
|---|---|
| F01 | Starter 1 |
| F02 | Starter 2 |
| F03 | Lambda sensor 1 |
| F04 | Engine control module |
| F05 | FlexFuel sensor |
| F06 | Transmission control module |
| F07 | – |
| F08 | Engine control module |
| F09 | Air conditioning clutch |
| F10 | Canister vent solenoid |
| F11 | Fuel system |
| F12 | Front heated seats |
| F13 | Afterboil pump |
| F14 | – |
| F15 | Lambda sensor 2 |
| F16 | Ignition coils |
| F17 | Engine control module |
| F18 | Selective catalytic reduction module (diesel only) |
| F19 | NOx soot sensor (diesel only) |
| F20 | DC DC converter 2 |
| F21 | Shift control |
| F22 | Antilock brake pump |
| F23 | Front/Rear washer pump |
| F24 | – |
| F25 | Diesel fuel heater (diesel only) |
| F26 | – |
| F27 | Antilock brake valves |
| F28 | LD trailer |
| F29 | Rear window defogger |
| F30 | Mirror defroster |
| F31 | – |
| F32 | Variable functions |
| F33 | – |
| F34 | Horn |
| F35 | – |
| F36 | Right high-beam headlamp |
| F37 | Left high-beam headlamp |
| F38 | Automatic headlamp leveling |
| F39 | Fog lamps |
| F40 | – |
| F41 | Transmission range control module |
| F42 | Motorized headlamp |
| 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 | Right daytime running lamp |
| F52 | Engine control module/Transmission control |
| F53 | – |
| F54 | – |
| F55 | Front wiper speed/Control |
| F56 | – |
| F57 | Left daytime running lamp |
| Relay | Usage |
|---|---|
| K01 | Starter solenoid |
| K02 | Air conditioning control |
| K03 | Engine control module |
| K04 | Front wiper control |
| K05 | Starter pinion |
| K06 | Fuel heater (diesel only) |
| K07 | – |
| K08 | – |
| K09 | Front wiper speed |
| K10 | – |
| K11 | – |
| K12 | High-beam headlamps |
| K13 | Headlamps/Daytime running lamps |
| K14 | Run/Crank |
| K15 | Rear window defogger |
| K16* | Horn |
| K17* | Selective catalytic reduction |
| K18* | Fog lamps |
| K19* | Coolant pump |
| K20* | – |
| K21* | Rear washer pump |
| K22* | Front washer pump |
| K23* | Rear wiper control |
Instrument Panel Fuse Block
The instrument panel fuse block is under the instrument panel on the driver 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.
| Fuse | Usage |
|---|---|
| F01 | DC AC inverter |
| F02 | Front windows |
| F03 | Trailer brake |
| F04 | Heating, ventilation, and air conditioning blower |
| F05 | Body control module 2 |
| F06 | CGM |
| F07 | – |
| F08 | Body control module 3 |
| F09 | Amplifier |
| F10 | – |
| F11 | – |
| F12 | – |
| F13 | – |
| F14 | Electronic shifter |
| F15 | Transmission control module |
| F16 | Front heated seats |
| F17 | Left data link connector |
| F18 | Body control module 7 |
| F19 | Exterior mirror |
| F20 | Body control module 1 |
| F21 | Body control module 4 |
| F22 | Body control module 6 |
| F23 | Electric steering column lock |
| 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 |
| F42 | Radio |
| Relay | Usage |
|---|---|
| K01 | Deadbolt |
| K02 | Retained accessory power |
| K03 | Liftgate |
| K04 | – |
| K05 | Logistics Circuit |
| Circuit Breakers | Usage |
|---|---|
| CB1 | – |
| CB2 | Auxiliary power outlet console |
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.
| Fuse | Usage |
|---|---|
| F1 | Exhaust fuel heater/Selective catalytic reduction power module (diesel only) |
| F2 | Liftgate |
| F3 | Trailer auxiliary power |
| F4 | Passenger Power Seat |
| F5 | Memory seat module |
| F6 | Sunroof |
| F7 | Side blind zone alert |
| F8 | Trailer reverse lamps |
| F9 | Rear heated seat 1 |
| F10 | Park Lamps |
| F11 | Rear heated seat 2 |
| F12 | – |
| F13 | Trailer parking lamp |
| F14 | Right trailer stoplamp/Turn signal lamp |
| F15 | Left parking lamp |
| F16 | Right parking lamp |
| F17 | Video processing module |
| F18 | Left trailer stoplamp/Turn signal lamp |
| F19 | All-wheel drive |
| F20 | Lumbar |
| F21 | Rear auxiliary power outlet |
| F22 | Rear drive unit |
| Relay | Usage |
|---|---|
| K1 | Right trailer stoplamp/Turn signal lamp |
| K2 | Trailer reverse lamps |
| K3 | Left trailer stoplamp/Turn signal lamp |
| K4 | Parking lamps |
| K5 | Exhaust fuel heater/Selective catalytic reduction power module (diesel only) |
How to Replace the Fuses of GMC Terrain
Replacing fuses in a GMC Terrain is a relatively straightforward process, and you can easily do it yourself following these detailed instructions and tips:
- Locate the Fuse Box: The fuse box in the GMC Terrain is typically located in the engine compartment or under the dashboard on the driver’s side. Look for a black plastic cover with fuse diagrams or labels indicating the different fuse positions.
- Turn off the Vehicle: Before you start replacing fuses, make sure to turn off the vehicle’s engine and remove the key from the ignition for safety.
- Remove the Blown Fuse: Use a fuse puller tool or a pair of needle-nose pliers to grasp and carefully pull out the blown fuse. Be gentle to avoid damaging the fuse box or surrounding components.
- Select a Replacement Fuse: Check the amperage rating printed on the blown fuse to determine the correct replacement. It’s crucial to use a fuse with the same amperage rating to prevent electrical issues or damage to the vehicle.
- Insert the Replacement Fuse: Carefully insert the new fuse into the corresponding slot in the fuse box. Ensure it fits snugly and is seated properly to establish a secure connection.
- Test the Component: After replacing the fuse, test the component or system to verify that it is functioning correctly. For example, if you replaced a fuse for the headlights, turn on the headlights to check if they are working.
- Replace the Fuse Box Cover: Once you’ve confirmed the replacement fuse is working, securely reattach the fuse box cover to protect the fuses from dust and moisture.
Tips:
- Keep a variety of spare fuses with different amperage ratings in your vehicle in case of emergencies.
- If you’re unsure which fuse is causing the issue, you can systematically check and replace fuses one by one until you identify the problem.
- Avoid using a fuse with a higher amperage rating than recommended, as it can lead to electrical damage or fire hazards.
- Regularly inspect and replace damaged or worn fuses to maintain the electrical integrity of your vehicle.
FAQs
The relay and fuse diagrams in the 2019 GMC Terrain serve as visual guides to help locate and identify specific electrical components and circuits within the vehicle.
You can visually inspect the fuse for signs of damage, such as a broken metal strip or discoloration, to determine if it needs replacement.
The fuse box in the 2019 GMC Terrain is typically located in the engine compartment or under the dashboard on the driver’s side.
You may need a fuse puller tool or a pair of needle-nose pliers to safely remove and replace fuses in the 2019 GMC Terrain.
It’s important to use a fuse with the same amperage rating as the original to ensure compatibility and prevent electrical issues.
Before replacing fuses, make sure to turn off the vehicle’s engine and remove the key from the ignition for safety.
It’s recommended to replace fuses with the vehicle turned off to avoid electrical hazards or damage to the vehicle’s systems.
A blown fuse may have a broken metal strip inside or appear discolored compared to intact fuses.
Fuses protect various electrical components and circuits in the 2019 GMC Terrain, including lights, power seats, heating systems, and more.
The relay and fuse diagrams are typically located on the fuse box cover or inside the fuse box compartment in the 2019 GMC Terrain.
Yes, you can visually inspect fuses by looking through the transparent plastic housing to check for signs of damage or discoloration.
It’s a good practice to periodically inspect and replace damaged or worn fuses to ensure the electrical integrity of the vehicle.
It’s recommended to use genuine or high-quality OEM fuses to ensure proper compatibility and reliability in the 2019 GMC Terrain.
After replacing a fuse, test the corresponding component or system to verify that it is functioning correctly.
Yes, always handle fuses with care and avoid touching electrical components or connections to prevent shocks or injuries.
Yes, relays can typically be replaced by removing and inserting them into their corresponding slots in the fuse box.
Useful Links
View Full PDF: GMC Terrain 2019 User Manual | Auto User Guide
2023 – 2024 GMC TERRAIN Review, Price, Features and Mileage (Brochure)