Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Disc Brake Component Specifications
2020 GMC Acadia SLSECTION Disc Brake Component Specifications
WARNING: This page is about a different car, the 2019 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.
| Application | Specification | |
|---|---|---|
| Metric | English | |
| Disc Brake Pads - Front and Rear | ||
| Maximum Allowable Taper | 0.15 mm | 0.0059 in |
| Minimum Friction Material Thickness | 2.0 mm | 0.078 in |
| Front Brake Rotor | ||
| Diameter | 321.0 mm | 12.638 in |
| Discard Thickness* | 27.0 mm | 1.063 in |
| Maximum Allowable Assembled Lateral Runout | 0.05 mm | 0.002 in |
| Maximum Allowable Scoring | 1.50 mm | 0.59 in |
| Maximum Allowable Thickness Variation | .025 mm | 0.001 in |
| Minimum Allowable Thickness After Refinish | 28.0 mm | 1.102 in |
| Thickness - New | 30.0 mm | 1.181 in |
| Rear Brake Rotor | ||
| Diameter | 315.0 mm | 12.402 in |
| Discard Thickness* | 21.0 mm | 0.827 in |
| Maximum Allowable Assembled Lateral Runout | 0.05 mm | 0.002 in |
| Maximum Allowable Scoring | 1.50 mm | 0.59 in |
| Maximum Allowable Thickness Variation | .025 mm | 0.002 in |
| Minimum Allowable Thickness After Refinish | 22.0 mm | 0.866 in |
| Thickness - New | 23.0 mm | 0.906 in |
| * All brake rotors have a discard dimension cast into them. Replace any rotor that does not meet this specification. After refinishing the rotor, replace any rotor that does not meet the discard thickness specification. | ||
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.