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Reply To: 2023 GMC Canyon AT4 Aux Switch

September 29, 2023 at 5:25 pm #781527
protonhead
Participant

You’re not going to like the answer! you need “Accessory Wiring Junction Block Package – Part Number 84938257”, which is an underhood installation. It’s not cheap. I have one and I think it was around $500. It also takes connections for the “AUX 1-2-3” optional switch that you can buy and installs in the driver side bolster panel. If you’re not at least a little experienced with this kind of install then the dealer installation charge is in addition!

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