Preliminary Service Specifications: Brakes

DISC BRAKE SPECIFICATIONS

Application	Specification
Application	Metric	English
Front Brake Rotors
Rotor Discard Thickness * RPO Codes: 2006 - L26, L32, 2007 - J65, JL9	30.7 mm	1.21 in
Rotor Discard Thickness * RPO Code: 2006 - LS4, 2007 - Z7U	29.0 mm	1.14 in
Rotor Maximum Allowable Lateral Runout RPO Code: 2006 - L26, L32, 2007 - J65, JL9	0.060 mm	0.002 in
Rotor Maximum Allowable Lateral Runout RPO Code: 2006 - LS4, 2007 - Z7U	0.030 mm	0.0012 in
Rotor Maximum Scoring	1.50 mm	0.059 in
Rotor Maximum Allowable Thickness Variation
RPO Code: 2006 - L26, L32, 2007 - J65, JL9	0.025 mm	0.001 in
RPO Code: 2006 - LS4, 2007 - Z7U	0.006 mm	0.00024 in
Rotor Minimum Allowable Thickness After Refinishing
RPO Code: 2006 - L26, L32, 2007 - J65, JL9	31.0 mm	1.22 in
RPO Code: 2006 - LS4, 2007 - Z7U	30.0 mm	1.18 in
Rotor Thickness-NEW
RPO Code: 2006 - L26, L32, 2007 - J65, JL9	32.2 mm	1.27 in
RPO Code: 2006 - LS4, 2007 - Z7U	32.0 mm	1.26 in
Rear Brake Rotors
Rotor Discard Thickness * RPO Code: 2006 - L26, L32, 2007 - J65, JL9	12.5 mm	0.49 in
Rotor Discard Thickness * RPO Code: 2006 - LS4, 2007 - Z7U	23.0 mm	0.91 in
Rotor Maximum Allowable Lateral Runout
RPO Code: 2006 - L26, L32, 2007 - J65, JL9	0.05 mm	0.002 in
RPO Code: 2006 - LS4, 2007 - Z7U	0.0305 mm	0.0012 in
Rotor Maximum Scoring	1.50 mm	0.059 in
Rotor Maximum Allowable Thickness Variation
RPO Code: 2006 - L26, L32, 2007 - J65, JL9	0.02 mm	0.001 in
RPO Code: 2006 - LS4, 2007 - Z7U	0.006 mm	0.00024 in
Rotor Minimum Thickness After Refinishing
RPO Code: 2006 - L26, L32, 2007 - J65, JL9	12.9 mm	0.51 in
RPO Code: 2006 - LS4, 2007 - Z7U	24.0 mm	0.945 in
Rotor Thickness-NEW
RPO Code: 2006 - L26, L32, 2007 - J65, JL9	14.00 mm	0.55 in
RPO Code: 2006 - LS4, 2007 - Z7U	26.00 mm	1.024 in
Brake Pedal Travel
Maximum specification with 445 N (100 lbs) of force applied to the brake pedal with the ignition OFF and the booster power reserve depleted	74 mm	2.91 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 minimum thickness specification.