The Cadillac Escalade GMT K2XL, produced between 2015 and 2020, is a full-size luxury SUV known for its bold design, powerful performance, and advanced features. Its electrical system, which includes the fuse box and relay components, is crucial for ensuring the vehicle’s functionality and reliability.
In the Cadillac Escalade GMT K2XL, the fuse box houses multiple fuses that protect various electrical circuits throughout the vehicle. These circuits power essential components such as the engine control module, lighting systems, climate control, entertainment features, and more. Fuses are designed to interrupt the circuit in the event of an electrical overload or short circuit, thereby safeguarding the associated systems from damage.
Relays in the Cadillac Escalade GMT K2XL serve as electrically operated switches that control high-current circuits. They play a vital role in activating and deactivating functions such as the starter motor, fuel pump, air conditioning compressor, and power windows or seats. Efficient relay operation ensures smooth power distribution and reliable performance of the vehicle’s electrical systems.
Regular inspection and maintenance of the fuse box and relays are essential to ensure the Cadillac Escalade GMT K2XL operates smoothly. This includes checking fuses for signs of wear or damage, ensuring relay connections are secure, and promptly addressing any electrical issues that may arise. Proper care of these components helps maintain the vehicle’s electrical integrity, enhancing safety and driving satisfaction in the Cadillac Escalade GMT K2XL (2015-2020).
MUST READ: DYI – How to Check Car Fuses?
(2015-2020) Cadillac Escalade GMT K2XL fuse box and relay with Diagram
WARNING
- Never replace a fuse with one that has a higher amperage rating.
- A fuse with a too-high amperage could damage the electrical part and cause a fire.
- On no account should fuses be repaired (e.g. patched up with tin foil or wire) as this may cause serious damage elsewhere in the electrical circuit or cause a fire.
- If a fuse blows repeatedly, do not keep replacing it. Instead, have the cause for the repeated short circuit or overload tracked and fixed.
- Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.
Cadillac Escalade GMT K2XL 2015-2020 fuse assignment
- Cigar lighter / power outlet fuses in the Cadillac Escalade are the fuses №. 4, 6 and 50 in the Left Instrument panel fuse box, fuses №. 3 and 50 in the Right Instrument panel fuse box, and fuse №. 14 (Rear Accessory Power Outlet) in the Rear compartment fuse box.
Year of production: 2015, 2016, 2017, 2018, 2019, 2020
Passenger compartment
Fuse Box Location
There are two fuse boxes that are located on both sides of the dashboard, behind covers.
Fuse box diagram (Left-side)
Assignment of the fuses and relays in the instrument panel (Left) (2015-2020)
| № | Description |
|---|---|
| 1 | Not Used |
| 2 | Not Used |
| 3 | Not Used |
| 4 | Accessory Power Outlet 1 |
| 5 | 2015-2016: Retained Accessory Power/Accessory 2017-2020: Retained accessory power |
| 6 | Accessory power outlet from battery power |
| 7 | Universal Garage Door Opener/Inside Rear View Mirror |
| 8 | SEO (Special equipment option) Retained Accessory Power |
| 9 | Not Used |
| 10 | Body Control Module 3 |
| 11 | Body Control Module 5 |
| 12 | Steering Wheel Controls Backlighting |
| 13 | Not Used |
| 14 | Not Used |
| 15 | Not Used |
| 16 | Discrete Logic Ignition Sensor |
| 17 | 2016-2017: Video processing module 2019-2020: Video processing module/Virtual key module |
| 18 | Mirror Window Module |
| 19 | Body Control Module 1 |
| 20 | Front Bolster (if equipped) |
| 21 | Not Used |
| 22 | Not Used |
| 23 | Not Used |
| 24 | 2015-2016: Heater, Ventilation and Air Conditioning Ignition/Heater, Ventilation and Air Conditioning Auxiliary 2017-2018: HVAC/Ignition 2019-2020: HVAC ignition/AUX HVAC ignition |
| 25 | Instrument Cluster Ignition/Sensing Diagnostic Module Ignition |
| 26 | Tilt Column/SEO 1 (Special equipment option), Tilt Column Lock/SEO (Special equipment option) |
| 27 | Data Link Connector/Driver Seat Module |
| 28 | Passive Entry/Passive Start/Heater, Ventilation and Air Conditioning Battery |
| 29 | Content theft deterrent |
| 30 | Not Used |
| 31 | Not Used |
| 32 | Not Used |
| 33 | 2015-2018: SEO (Special equipment option)/Automatic Level Control 2019-2020: SEO (Special equipment option)/Left heated seat |
| 34 | Park Enable Electric Adjustable Pedal (if equipped) |
| 35 | Not Used |
| 36 | Miscellaneous run/crank loads |
| 37 | Heated Steering Wheel |
| 38 | Steering Column Lock 2 (if equipped) |
| 39 | Instrument Cluster Battery |
| 40 | Not Used |
| 41 | Not Used |
| 42 | Euro Trailer (if equipped) |
| 43 | Left Doors |
| 44 | Driver Power Seat |
| 45 | Not Used |
| 46 | Right Heated/Cooled Seat |
| 47 | Left Heated/Cooled Seat |
| 48 | Not Used |
| 49 | Not Used |
| 50 | Accessory Power Outlet 2 |
| 51 | Not Used |
| 52 | Retained Accessory Power/Accessory Relay |
| 53 | Run/Crank Relay |
| 54 | Not Used |
| 55 | Not Used |
| 56 | Not Used |
Fuse box diagram (Right-side)
Assignment of the fuses and relays in the instrument panel (Right) (2015-2020)
| № | Description |
|---|---|
| 1 | Not Used |
| 2 | Not Used |
| 3 | Not Used |
| 4 | Accessory Power Outlet 4 |
| 5 | Not Used |
| 6 | Not Used |
| 7 | Not Used |
| 8 | Glove Box |
| 9 | Not Used |
| 10 | Not Used |
| 11 | Not Used |
| 12 | Steering Wheel Controls |
| 13 | Body Control Module 8 |
| 14 | Not Used |
| 15 | Not Used |
| 16 | Not Used |
| 17 | Not Used |
| 18 | Not Used |
| 19 | Body Control Module 4 |
| 20 | Rear Seat Entertainment |
| 21 | Sunroof |
| 22 | Not Used |
| 23 | Not Used |
| 24 | Not Used |
| 25 | Not Used |
| 26 | Infotainment/Airbag |
| 27 | Spare/RF window switch/Rain sensor |
| 28 | Obstacle Detection/USB |
| 29 | Radio |
| 30 | Not Used |
| 31 | Not Used |
| 32 | Not Used |
| 33 | Not Used |
| 34 | Not Used |
| 35 | Not Used |
| 36 | SEO (Special equipment option) B2 |
| 37 | SEO (Special equipment option) |
| 38 | Body Control Module 2 |
| 39 | A/C Inverter |
| 40 | Not Used |
| 41 | Not Used |
| 42 | Not Used |
| 43 | Not Used |
| 44 | Right Door Window Motor |
| 45 | Front Blower |
| 46 | Body Control Module 6 |
| 47 | Body Control Module 7 |
| 48 | Amplifier |
| 49 | Right Front Seat |
| 50 | Accessory Power Outlet 3 |
| 51 | Not Used |
| 52 | Retained Accessory Power/Accessory Relay |
| 53 | Not Used |
| 54 | Not Used |
| 55 | Not Used |
| 56 | Not Used |
Engine compartment
Fuse Box Location
Fuse box diagram
Assignment of the fuses and relays in the engine compartment (2015-2020)
| № | Description |
|---|---|
| 1 | Electric Running Boards |
| 2 | Antilock Brake System Pump |
| 3 | Interior BEC LT1 |
| 4 | Passenger motorized safety belt |
| 5 | Suspension Leveling Compressor |
| 6 | 4WD Transfer Case Electronic Control |
| 10 | Electric Parking Brake |
| 13 | Interior BEC LT2 |
| 14 | Rear BEC 1 |
| 17 | Driver motorized safety belt |
| 21 | 2015-2017: ALC Exhaust Solenoid 2019-2020: Automatic headlamp leveling/Exhaust solenoid |
| 22 | 2019: Fuel pump |
| 23 | Integrated Chassis Control Module |
| 24 | Real Time Dampening |
| 25 | Fuel Pump Power Module |
| 26 | 2015-2017: Spare/Battery Regulated Voltage Control 2019-2020: Active Hydraulic Assist/ Battery regulated voltage control |
| 28 | Upfitter 2 |
| 29 | Upfitter 2 Relay |
| 30 | Wiper |
| 31 | Trailer interface module |
| 34 | Back-up Lamps |
| 35 | Antilock Brake System Valve |
| 36 | Trailer Brakes |
| 37 | Upfitter 3 Relay |
| 39 | Trailer Stop/Turn Right |
| 40 | Trailer Stop/ Turn Left |
| 41 | Trailer Park Lamps |
| 42 | Right Parking Lamps |
| 43 | Left Parking Lamps |
| 44 | Upfitter 3 |
| 45 | Automatic Level Control Run/Crank |
| 47 | Upfitter 4 |
| 48 | Upfitter 4 Relay |
| 49 | Reverse Lamps |
| 51 | Parking Lamp Relay |
| 60 | Air Conditioning Control |
| 63 | Upfitter 1 |
| 67 | Trailer Battery |
| 68 | 2019-2020: Secondary fuel pump |
| 69 | RC Upfitter 3 and 4 |
| 70 | VBAT Upfitter 3 and 4 |
| 72 | Upfitter 1 Relay |
| 74 | Engine Control Module Ignition |
| 75 | Miscellaneous Ignition Spare |
| 76 | Transmission Ignition |
| 77 | RC Upfitter 1 and 2 |
| 78 | VBAT Upfitter 1 and 2 |
| 83 | Spare/Spare |
| 84 | Run/Crank Relay |
| 87 | 2015-2017: Engine 2019-2020: MAF/IAT/Humidity/TIAP sensor |
| 88 | Injector A – Odd |
| 89 | Injector B – Even |
| 90 | Oxygen Sensor B |
| 91 | Throttle Control |
| 92 | Engine Control Module Relay |
| 93 | Horn |
| 94 | Fog Lamps |
| 95 | High-Beam Headlamps |
| 100 | Oxygen Sensor A |
| 101 | Engine Control Module |
| 102 | Engine Control Module/Transmission Control Module |
| 103 | Auxiliary Interior Heater |
| 104 | Starter |
| 107 | Aero Shutter |
| 109 | Police Upfitter |
| 112 | Starter Relay |
| 114 | Front Windshield Washer |
| 115 | Rear Window Washer |
| 116 | Cooling Fan Left |
| 117 | 2015-2016: Not Used 2017-2020: Fuel pump prime |
| 120 | 2015-2016: Not Used 2017-2020: Fuel pump prime |
| 121 | Right HID Headlamp |
| 122 | Left HID Headlamp |
| 123 | Cooling Fan Right |
Fuse Box in the rear compartment
Fuse Box Location
It is located on the left side of the luggage compartment, behind the cover.
Fuse box diagram
Assignment of the fuses and relays in the rear compartment (2015-2020)
| № | Description |
|---|---|
| ISO Mini Relays | |
| 1 | Rear Defogger |
| Micro Fuses | |
| 2 | Heated Second Row Seat Left |
| 3 | Heated Second Row Seat Right |
| 4 | Heated Mirrors |
| 5 | Liftgate |
| 6 | Glass Breakage |
| 7 | Liftgate Glass |
| 8 | Liftgate Module Logic |
| 9 | Rear Wiper |
| 10 | Rear Heater, Ventilation and Air Conditioning Blower |
| 11 | Second Row Seat |
| 19 | Rear Fog Lamp (if equipped) |
| M-Type Fuses | |
| 12 | Liftgate Module |
| 13 | Third Row Seat |
| 14 | Rear Accessory Power Outlet |
| 15 | Rear Defogger |
| Ultra Micro Rylays | |
| 16 | Liftgate |
| Micro Relays | |
| 17 | Liftgate Glass |
| 18 | Rear Fog Lamp (if equipped) |
| 19 | Heated Mirrors |
Conclusion
For owners and enthusiasts of classic Cadillac Escalade GMT K2XL 2015-2020, understanding the fuse box and relay systems is essential for vehicle maintenance. Regular inspection and maintenance of these components helped ensure the vehicle’s longevity and reliability, preserving its status as a symbol of Cadillac’s craftsmanship and innovation in the automotive industry during that era.
