mobile-menu-icon
GM Authority

Reply To: 2023 GMC Canyon AT4 Aux Switch

#784305
protonhead
Participant

Also, the part number for the “Accessory wiring junction box is not correct. The part number above is included with part number 86544321

My truck is a 2023 AT4X but I believe that part number fits multiple trucks.

Under the hood on the passenger side firewall (about a foot to the right and just under the windshield a few inches) are two black bolts poking out with nothing on them. They are used to mount the box.

Subscribe to GM Authority

For around-the-clock GM news coverage

We'll send you one email per day with the latest GM news. It's totally free.