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Brake Rotor/Disc|Service and Repair > < GM Brake Service Procedure|Page 5894
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Brake Rotor/Disc: Specifications

GENERAL SPECIFICATIONS

Front Brakes

Rotor Discard Thickness* ..................................................................................................................................................................  27.5 mm (1.08 inch)
Rotor Thickness (new) .......................................................................................................................................................................  29.0 mm (1.14 inch)
Rotor Maximum Allowable Lateral Runout ..................................................................................................................................  0.051 mm (0.002 inch)
Rotor Maximum Allowable Scoring ................................................................................................................................................  1.50 mm (0.059 inch)
Rotor Maximum Allowable Thickness Variation ..........................................................................................................................  0.025 mm (0.001 inch)

Rear Brakes

Rotor Discard Thickness* ..............................................................................................................................................................  18.50 mm (0.728 inch)
Rotor Thickness (new) .......................................................................................................................................................................  2.0 mm (0.787 inch)
Rotor Maximum Allowable Lateral Runout ..................................................................................................................................  0.051 mm (0.002 inch)
Rotor Maximum Allowable Scoring ................................................................................................................................................  1.50 mm (0.059 inch)
Rotor Maximum Allowable Thickness Variation ..........................................................................................................................  0.025 mm (0.001 inch)

*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 minimum thickness specification.

Brake Rotor/Disc|Service and Repair > < GM Brake Service Procedure|Page 5894