2015 GMC Yukon Fuse Box Diagram & Amperages

As an ASE-certified master technician, I’ve spent countless hours tracking down electrical gremlins in full-size SUVs. The 2015 GMC Yukon (part of the GMT K2XX platform) is a robust electrical beast, packed with advanced infotainment, trailer towing tech, and heavy-duty climate controls. When something electrical stops working, your first stop should always be the fuse boxes.

Below is a comprehensive guide to the fuse box locations, amperage ratings, and circuit diagrams for the 2015 GMC Yukon. Note: Fuse configurations can vary depending on your specific trim level (SLE, SLT, or Denali) and options. Always verify with the printed legend on the inside of your fuse box lid.

Quick answer: Where are the fuse boxes on a 2015 GMC Yukon?

The 2015 GMC Yukon has four main fuse block locations:

1. Engine Compartment Fuse Block: Located under the hood on the driver’s side, near the battery.
2. Left Instrument Panel Fuse Block: Located inside the cabin, on the driver’s side of the dashboard (accessible when the driver’s door is open).
3. Right Instrument Panel Fuse Block: Located inside the cabin, on the passenger side of the dashboard (accessible when the passenger door is open).
4. Rear Compartment Fuse Block: Located in the cargo area, behind a trim panel on the driver’s side rear quarter.

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Engine Compartment Fuse Block

This is the main power distribution center for the heavy-draw and critical engine components. It houses the fuses and relays for the ECM, ABS, fuel pump, starter, and exterior lighting.

Fuse #	Amp	Color	Circuit / Component Protected
5	15A	Blue	Engine Control Module (ECM) / Ignition
10	10A	Red	Air Conditioning (A/C) Clutch
13	15A	Blue	Fuel Pump Motor
24	20A	Yellow	Trailer Park Lamps
27	30A	Green	Antilock Brake System (ABS) Pump
31	10A	Red	Headlights - High Beam Left
32	10A	Red	Headlights - High Beam Right
38	15A	Blue	Headlights - Low Beam Left
39	15A	Blue	Headlights - Low Beam Right
45	40A	Green (J-Case)	Front Blower Motor
54	40A	Green (J-Case)	Starter Motor
61	30A	Pink (J-Case)	Trailer Brake Controller (Heavy Duty)
63	30A	Pink (J-Case)	Cooling Fan 1

Common Relays in this block:

• Relay 69: Starter Relay
• Relay 70: Fuel Pump Relay
• Relay 74: A/C Control Relay
• Relay 78: Engine Control (Powertrain) Relay

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Left Instrument Panel Fuse Block

Located on the driver's side of the dashboard. Pop off the side cover to access it. This block primarily protects interior cabin accessories and driver-side body controls.

Fuse #	Amp	Color	Circuit / Component Protected
1	10A	Red	Instrument Cluster / Driver Information Center
3	15A	Blue	Body Control Module (BCM) 1
11	20A	Yellow	Power Windows - Driver Side
16	15A	Blue	Steering Wheel Controls
20	15A	Blue	Airbags (Sensing and Diagnostic Module)
25	10A	Red	Data Link Connector (OBD2 Port)

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Right Instrument Panel Fuse Block

Located on the passenger side of the dashboard, behind the side cover. This block handles infotainment, auxiliary power, and passenger-side accessories.

Fuse #	Amp	Color	Circuit / Component Protected
2	20A	Yellow	Power Windows - Passenger Side
4	15A	Blue	Radio / Infotainment System Audio
5	15A	Blue	Radio Displays / HMI Module
8	15A	Blue	Body Control Module (BCM) 3
15	20A	Yellow	Front Cigar Lighter / 12V Auxiliary Outlet
17	20A	Yellow	Rear Console 12V Auxiliary Outlet
21	15A	Blue	Amplifier (Bose Audio System)

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Rear Compartment Fuse Block

Located in the trunk/cargo area on the driver's side behind the trim panel. This block manages rear climate control, power liftgate, and trailer-related body functions.

Fuse #	Amp	Color	Circuit / Component Protected
3	30A	Pink (J-Case)	Power Liftgate Module
6	20A	Yellow	Rear Seat Heating
12	30A	Green	Rear Blower Motor (HVAC)
15	15A	Blue	Rear Wiper Motor
22	10A	Red	Trailer Reverse Lamps

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How to test a fuse

Before you start ripping into wiring harnesses, confirm the fuse is actually blown. Here is the proper way a technician tests fuses:

1. Visual Inspection: Pull the suspected fuse using fuse pullers or needle-nose pliers. Hold it up to a light and look at the U-shaped metal wire inside. If the wire is broken or there is a dark, scorched mark, the fuse is blown and needs replacement.
2. Use a Multimeter or Test Light: This is the faster, more professional method. Turn the vehicle's ignition to the "ON" position (do not start the engine). Take your 12V test light, ground the clip to a bare metal chassis point, and touch the probe to the small metal test points exposed on the top of the fuse.
3. Reading the Test: If the light illuminates on both sides of the fuse, the fuse is good. If it lights up on one side but not the other, the fuse is blown.
4. Replacement: Always replace a blown fuse with one of the exact same amperage rating and color. Putting a 30A fuse in a 15A slot is a massive fire hazard and can fry expensive modules.

Common blown fuses on this vehicle

The 2015 GMC Yukon is highly reliable, but certain circuits are notorious for blowing due to accessory use or wear:

• 12V Outlets / Cigar Lighter (Right Dash Fuses 15 & 17): These are the most common blown fuses. Usually caused by a faulty phone charger, a dropped coin in the socket, or plugging in a high-draw device like a portable tire inflator.
• Trailer Park / Reverse Lamps (Under-hood Fuse 24, Rear Fuse 22): The Yukon is a popular tow rig. Corroded trailer wiring or a short in your boat/utility trailer will pop these fuses instantly. Always check your trailer's wiring harness if these blow.
• Radio / Infotainment (Right Dash Fuses 4 & 5): The GM IntelliLink system can sometimes glitch out. Occasionally, pulling and replacing the radio fuse acts as a hard reset for a frozen screen, even if the fuse isn't actually blown.
• Front Blower Motor (Under-hood Fuse 45): If your A/C or heater stops blowing air, check this 40A J-Case fuse first. If the fuse keeps blowing, your blower motor resistor or the blower motor itself is likely drawing too much current and failing.

Electrical issues can be incredibly frustrating. If you've replaced a fuse and it immediately pops again, you have a dead short to ground that requires a professional diagnosis. Don't risk melting your wiring harness! Find a trusted shop on Repairius.