Fuse Diagrams: 2021 Cadillac XT6 Fuses and Relay Guide
To fully understand the 2021 Cadillac XT6’s electrical system, one must first look at its carefully designed fuse diagram and relay configuration. This is similar to a technical blueprint that shows the secrets of the car’s electrical structure. The fuse diagram is very helpful because it carefully shows what each fuse does and what electrical part it connects to. It shows basic functions like lights and climate control as well as more complex ones like safety and entertainment systems. At the same time, the relay structure gives you a better idea of how electrical currents are directed and controlled inside the XT6, which makes sure that important functions run smoothly. Basically, this detailed guide not only gives owners the tools they need to fix any problems that might come up, but it also shows how dedicated Cadillac is to making the complicated world of car tech more open and easy to understand in the 2021 XT6 model.
2024 Cadillac XT6 Specs, Price, Features, Mileage (Review)
Electrical System
Electrical System Overload
The vehicle has fuses and circuit breakers to protect against an electrical system overload.
When the current electrical load 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.
Fuses and circuit breakers 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, 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. 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.
To check a fuse, look at the silver-coloured 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.
Engine Compartment Fuse Block
The underhood fuse block is in the engine compartment, on the driver’s side of the vehicle.
Caution
Do not pull the engine compartment fuse block lever, since it is intended only for service purposes. If pulled, vehicle malfunction may occur.
Caution
Spilling liquid on any electrical component of the vehicle may damage it. Always keep the covers on any electrical component.
To remove the fuse block cover, press the clips on the cover and lift it straight up.
The vehicle may not be equipped with all of the fuses, relays, and features shown.
| Fuses | Usage |
| F1 | Antilock Brake System |
| F2 | Starter 1 |
| F3 | DC-DC Transformer 1 |
| F4 | – |
| F5 | DC-DC Transformer 2 |
| F6 | Amplifier 1 |
| F7 | Front Blower |
| F8 | Starter 3 |
| F9 | – |
| F10 | – |
| F11 | – |
| F12 | Front Wiper |
| F13 | Starter 2 |
| F14 | – |
| F15 | Rear Wiper 1 |
| F16 | – |
| F17 | – |
| F18 | Automatic Headlamp Leveling Module |
| F19 | – |
| F20 | – |
| F21 | – |
| F22 | Electronic Brake Control Module |
| F23 | Parking/Trailer Lamps |
| F24 | Right Trailer Stoplamp/Turnlamp |
| F25 | Steering Column Lock |
| F26 | – |
| F27 | Left Trailer Stoplamp/ Turnlamp |
| F28 | – |
| F29 | – |
| F30 | Washer Pump |
| F31 | – |
| F32 | Headlamp Left |
| F33 | – |
| F34 | Horn |
| F35 | – |
| F36 | – |
| F37 | Headlamp Right |
| F38 | Not Used/Spare |
| F39 | Transmission Control Module 1 |
| F40 | Left Rear Bus Electrical Center/DC DC Ignition |
| F41 | Instrument Cluster |
| F42 | Heating, Ventilation, and Air Conditioning/ Central Gateway Module/Run/Crank |
| F43 | Head up Display/ Reflective Light Auxiliary |
| F44 | Electronic Brake Control Module Electric Brake Booster/Run/Crank |
| F45 | – |
| F46 | – |
| F47 | – |
| F48 | Rear Wiper 2 |
| F49 | Interior Rearview Mirror/Trailer/Rear Heated Seats/Run/ Crank |
| F50 | Fuel Tank Zone Module/Run/Crank |
| F51 | Heated Steering Wheel |
| F52 | Folding Seats Switch |
| F53 | Engine Coolant Pump |
| F54 | – |
| F55 | Air Conditioning Clutch |
| F56 | Not Used/Spare |
| F57 | Engine Control Module/Ignition |
| F58 | Transmission Control Module/Ignition |
| F59 | Engine Control Module Battery |
| F60 | – |
| F61 | O2 Sensor 1/ Aeroshutter/Mass Air Flow Sensor |
| F62 | Engine Control Module – Odd |
| F63 | O2 Sensor 2 |
| F64 | Engine Control Module – Even |
| F65 | Engine Control Module Powertrain 1 |
| F66 | Engine Control Module Powertrain 2 |
| F67 | Engine Control Module Powertrain 3 |
| F68 | – |
| F69 | – |
| F70 | – |
| F71 | – |
| F72 | – |
| F73 | – |
| F74 | – |
| F75 | – |
| F76 | – |
| F77 | – |
| Relays | Usage |
| K1 | Starter 1 |
| K2 | Run/Crank |
| K3 | Starter 3 |
| K4 | – |
| K5 | Air Conditioning |
| K6 | – |
| K7 | Engine Control Module |
| K8 | Folding Seats |
| K9 | – |
| K10 | Starter 2 |
Instrument Panel Fuse Block
The instrument panel fuse block is in the center console between the driver and passenger seats. To access the fuses, open the fuse panel door, or remove the panel from the passenger side by pulling it out or seeing your dealer.
To reinstall the door, push the door back into its original location. The vehicle may not be equipped with all of the fuses, relays, and features shown.
2024 Cadillac XT6 Specs, Price, Features, Mileage (Review)
| Fuses | Usage |
| F1 | Body Control Module 6 |
| F2 | Diagnostic link/ Central gateway module |
| F3 | Electric steering column lock |
| F4 | – |
| F5 | Logistics |
| F6 | Heating, ventilation, and air conditioning |
| F7 | Body control module 3 |
| F8 | – |
| F9 | Right front heated seat |
| F10 | Airbag/Seat belt |
| F11 | – |
| F12 | Amplifier 2 |
| F13 | The body control module 7 |
| F14 | Spare/Left front heated seat |
| F15 | Instrument panel switch bank |
| F16 | Sunroof |
| F17 | Body control module 1 |
| F18 | Instrument cluster/ Head-up display |
| F19 | – |
| F20 | Rear seat entertainment |
| F21 | Body control module 4 |
| F22 | Infotainment/USB data/Aux jack |
| F23 | Body control module 2 |
| F24 | USB charger/ Wireless charging |
| F25 | Park assist/ Electronic shift select |
| F26 | CIM |
| F27 | Video/Night vision module |
| F28 | Heating, ventilation, and air conditioning display |
| F29 | Radio |
| F30 | Steering wheel adjustment controls |
| F31 | Electric brake boost |
| F32 | DC AC inverter |
| F33 | Driver power seat |
| F34 | Passenger power seat |
| F35 | Battery IEC 1 feed |
| F36 | Electric power steering |
| F37 | Rear seat entertainment/USB charge/Wireless charging module/ Auxiliary power outlet/Lighter |
| F38 | Body Control Module 8 |
| F39 | – |
| Circuit Breakers/Minifuses | Usage |
| F40 | – |
| F41 | – |
| F42 | Auxiliary power outlet (CB)/Lighter (mini fuse) |
Rear Compartment Fuse Block
The rear compartment fuse block is in the cargo area, on the driver’s side of the vehicle behind the lower trim panel. To access the fuses in the Rear Electrical Center, remove the centre cargo bin, and then the small side bin. See Rear Storage 0 93. See your dealer if additional assistance is needed.
The label for this fuse block is in the spare tire area, on the foam under the cargo floor.
The vehicle may not be equipped with all of the fuses, relays, and features shown.
| Fuses | Usage |
| F1 | – |
| F2 | Trailer battery 1 |
| F3 | Driver seat belt motor |
| F4 | Rear blower |
| F5 | Rear drive control |
| F6 | Passenger seat belt motor |
| F7 | Right window |
| F8 | Rear defogger |
| F9 | Left window |
| F10 | Folding seats 1 |
| F11 | Trailer reverse |
| F12 | – |
| F13 | – |
| F14 | – |
| F15 | – |
| F16 | – |
| F17 | – |
| F18 | Trailer module |
| F19 | Ventilated seats/Left front heated seats/ Run/Crank |
| F20 | – |
| F21 | Trailer connector |
| F22 | – |
| F23 | – |
| F24 | Passenger window switch |
| F25 | – |
| F26 | Trailer brake |
| F27 | – |
| F28 | Passive entry/Passive start |
| F29 | – |
| F30 | Canister vent |
| F31 | – |
| F32 | Heated mirror |
| F33 | – |
| F34 | Liftgate module |
| F35 | The fuel system control module |
| F36 | – |
| F37 | – |
| F38 | Window module |
| F39 | – |
| F40 | Memory seat module |
| F41 | Automatic occupancy sensor |
| F42 | Trailer battery 2 |
| F43 | – |
| F44 | Third-row seats |
| F45 | Liftgate motor |
| F46 | Rear heated seats |
| F47 | – |
| F48 | Glass break sensor |
| F49 | – |
| F50 | – |
| F51 | – |
| F52 | Active dampening system module |
| F53 | – |
| F54 | External object calculating/Side blind zone alert |
| F55 | Theft deterrent |
| F56 | Universal garage door opener/Rain sensor |
| F57 | Folding seats 2 |
| Circuit Breakers | Usage |
| CB1 | – |
| CB2 | – |
| CB3 | Rear auxiliary power outlet |
| Relays | Usage |
| K1 | Folding seats 1 |
| K2 | – |
FAQs
The fuse box in the 2021 Cadillac XT6 is typically located in the passenger compartment. It’s often found under the dashboard on the driver’s side or in the glove compartment.
To access the fuse box, you may need to open the driver’s side door and locate a panel on the side of the dashboard. Remove the panel to reveal the fuse box.
Typically, you’ll only need a pair of needle-nose pliers or a fuse puller, which may come with the vehicle’s fuse box. Sometimes a small flathead screwdriver can also help.
Yes, most vehicles, including the Cadillac XT6, come with spare fuses. These are often located inside the fuse box cover.
Use the fuse diagram, which is often printed on the inside of the fuse box cover or in the owner’s manual, to identify which fuse corresponds to the malfunctioning component.
Before replacing a fuse, make sure the corresponding electrical component is turned off. This helps prevent electrical shorts.
It’s important to use the correct type and amperage of fuse for your Cadillac XT6. Using the wrong type or amperage can cause electrical issues or even damage to your vehicle.
Use a fuse puller tool or a pair of needle-nose pliers to grip the fuse firmly and pull it straight out of its socket.
If a fuse keeps blowing, it could indicate an underlying electrical issue. Consult your owner’s manual or a certified technician for further diagnosis and repair.
Yes, replacing fuses is generally a simple and safe task. Just make sure to follow proper procedures and use caution when handling electrical components.
Using a fuse with the wrong amperage rating can lead to electrical problems, including potential damage to your vehicle’s wiring or components.
Common electrical issues in vehicles, including the Cadillac XT6, can include malfunctioning power windows, interior lights, or audio systems, which may necessitate fuse replacement.
It’s generally recommended to use OEM (Original Equipment Manufacturer) fuses for your Cadillac XT6 to ensure compatibility and reliability.
If you’re unable to resolve an electrical issue by replacing fuses, it’s advisable to seek assistance from a qualified automotive technician who can diagnose and repair the problem effectively.
Useful Link:
View full PDF: Cadillac XT6 2021 User Manual | Auto User Guide