I didn't take a look at 2025 Canyon Manual, but my new GMC Sierra is a lot different than my 2016 Canyon was to tow. However, both my 2016 and my 2024 require that the battery be disconnected. I think that is the same along all the newer GM lines.
On my 2024 Sierra, I have to place the transmission in Neutral. Then I press the two-wheel drive button (2H) five times. That places the transfer case into Neutral. I then place the transmission in Park and shut the truck off. You then hold down the push button start without your foot on the brake, so you basically put the ignition into Accessory mode. Then the battery is disconnected. It sounds like a lot but takes under a minute.
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Don & Mary
2019 Newmar Dutch Star 4018 (Freightliner)
2024 GMC Sierra 1500 Denali 4x4 6.2L
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