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The Canyon AT4X comes with 13.4 inch front brake rotors and 13.3 inch rear brake rotors.
The AT4X come standard with hill descent control as well.

Introducing the 2023 GMC Canyon AT4X - The Most Advanced Off-Road Midsize Truck
The official vehicle of nowhere is here: the 2023 GMC Canyon midsize truck. Boasting a fully redesigned exterior with a standard factory lift and widened track across the lineup, a new premium suite of advanced technology and an all-new interior design, the next-generation Canyon is built from...
Brake Type: | Power-assisted four-wheel discs with Duralife™ long-life brake rotors; standard ABS; hill descent control available (std. AT4 & AT4X) |
Brake Rotor Size (in / mm): | 13.4 / 340 (front) 13.3 / 337 (rear) |