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Brake Rotor/Disc|Testing and Inspection > < GM Brake Service Procedure|Page 15337
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Brake Rotor/Disc: Specifications

Front Brakes

Rotor Minimum Thickness * ....................................................................................................................................................................  27.5 mm 1.08 in
Rotor Thickness - New .............................................................................................................................................................................  29.0 mm 1.14 in
Rotor Maximum Allowable Lateral Runout .........................................................................................................................................  0.051 mm 0.002 in
Rotor Maximum Allowable Scoring ......................................................................................................................................................  1.50 mm 0.059 in
Rotor Maximum Allowable Thickness Variation .................................................................................................................................  0.025 mm 0.001 in

Rear Brakes

Rotor Minimum Thickness * ................................................................................................................................................................  18.50 mm 0.728 in
Rotor Thickness - New ...........................................................................................................................................................................  20.0 mm 0.787 in
Rotor Maximum Allowable Lateral Runout .........................................................................................................................................  0.051 mm 0.002 in
Rotor Maximum Allowable Scoring ......................................................................................................................................................  1.50 mm 0.059 in
Rotor Maximum Allowable Thickness Variation .................................................................................................................................  0.025 mm 0.001 in

* All brake rotors have a minimum thickness dimension cast into them. Replace any rotor that is worn or machined below this specification.

Brake Rotor/Disc|Testing and Inspection > < GM Brake Service Procedure|Page 15337