2016 GMC Acadia Fuse Box Diagram & Amperage

Quick Answer

The 2016 GMC Acadia has three main fuse box locations: under the hood, behind the glove box on the passenger side, and in the rear cargo area.

Under-Hood Fuse Boxes

There are two fuse boxes located under the hood of your 2016 GMC Acadia. These boxes contain fuses and relays for critical engine functions, cooling systems, and other high-current components. Always disconnect the negative battery terminal before inspecting or replacing fuses in this area. Refer to your owner's manual or the fuse box lid for the exact diagram for your specific trim level, as configurations can vary slightly.

Under-Hood Fuse Block (Driver's Side)

This fuse block is typically located near the battery on the driver's side.

Relay Locations (Under-Hood Driver's Side):

• RL1: Fuel Pump Relay
• RL2: Starter Relay
• RL3: Headlight Low Beam Left Relay
• RL4: Headlight Low Beam Right Relay
• RL5: Cooling Fan 1 Relay
• RL6: Cooling Fan 2 Relay
• RL7: Horn Relay
• RL8: A/C Compressor Clutch Relay

Under-Hood Fuse Block (Passenger's Side)

This fuse block is typically located closer to the passenger side, sometimes integrated with other modules.

Relay Locations (Under-Hood Passenger's Side):

• RL10: Headlight High Beam Left Relay
• RL11: Headlight High Beam Right Relay
• RL12: Wiper Motor High Speed Relay
• RL13: Wiper Motor Low Speed Relay

Passenger Compartment Fuse Block (Behind Glove Box)

This fuse block is located inside the vehicle, typically behind the glove box on the passenger side. You may need to open or remove the glove box to access it. This block contains fuses for various interior electrical components, infotainment, power outlets, and safety systems.

Rear Cargo Area Fuse Block

This fuse block is typically located in the rear cargo area, often on the side panel or under the floor panel. It provides power to rear accessories, power outlets, and sometimes trailer connections.

How to Test a Fuse

Testing a fuse is a straightforward process. You will need a fuse puller (usually found in one of the fuse boxes) and a multimeter or a 12V test light.

1. Locate the Fuse: Identify the suspected fuse using the diagrams above and your vehicle's fuse box lid legend.
2. Remove the Fuse: Use the fuse puller to carefully extract the fuse from its slot.
3. Visual Inspection: Hold the fuse up to the light. If the metal wire or strip inside is broken or burnt, the fuse is blown and needs replacement.
4. Test with a Multimeter (Continuity Test): Set your multimeter to the continuity setting (often indicated by a speaker or diode symbol). Touch the probes to the metal contacts on each end of the fuse. A good fuse will show continuity (the multimeter will beep or show a reading close to zero ohms). A blown fuse will show no continuity.
5. Test with a Test Light: With the fuse still in its slot, touch the test light probe to the two small metal test points on the top of the fuse. If the light illuminates on both sides, the fuse is good. If it only illuminates on one side or not at all, the fuse is blown.

Always replace a blown fuse with a new fuse of the exact same amperage rating and type. Using a fuse with a higher rating can lead to serious electrical damage or fire.

Common Blown Fuses on This Vehicle

While any fuse can blow, some are more common than others due to the nature of the circuits they protect or the components themselves. If you're experiencing an electrical issue, here are some common fuses to check first on a 2016 GMC Acadia:

• Cigar Lighter/12V Power Outlet Fuse (Passenger Compartment F2, 15A): These outlets are frequently overloaded by high-draw accessories, leading to blown fuses. If your phone charger or accessory isn't working, check this first.
• Blower Motor Fuse (Under-Hood F5, 25A): Issues with the HVAC blower motor, such as a seized motor or a blockage in the fan, can cause this fuse to blow, resulting in no airflow from the vents.
• Radio/Infotainment Fuse (Passenger Compartment F1, 10A): If your radio, navigation, or infotainment screen suddenly goes blank, this fuse is a prime suspect. Sometimes, external devices connected to the USB ports can also cause this fuse to trip.
• Headlight Fuses (Under-Hood F7, F8, F20, F21): If one or both of your headlights stop working, check the relevant low beam (F7, F8) or high beam (F20, F21) fuse. Also, verify the bulb itself is not faulty.
• Trailer Brake/Trailer Charge Fuses (Rear Cargo Area F4, F5, F6 / Under-Hood F24): If you're having issues with your trailer lights or charging, always check these specific fuses first, as problems with trailer wiring are common.

Before checking fuses, always consider what component or system recently failed. This can help you narrow down which fuse to inspect. If a fuse repeatedly blows after replacement, there is an underlying electrical problem that needs professional diagnosis.

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