Disc Brake Component Specifications. GMC Truck Sierra

For 1990-2009 cars only

Makes 🢒 GMC_Truck 🢒 2009 🢒 Sierra - 4WD 🢒 Brakes 🢒 Disc Brakes 🢒 Disc Brake Component Specifications

Application	Specification
Application	Metric	English
Front Brakes JD9, JF3, JF7
Rotor Discard Thickness*	28.0 mm	1.10 in
Rotor Minimum Allowable Thickness After Refinish	28.0 mm	1.10 in
Rotor Thickness (new)	30.0 mm	1.181 in
Rotor Maximum Allowable Assembled Lateral Runout	0.05 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
Front Brakes JH6, JH7
Rotor Discard Thickness*	36.50 mm	1.437 in
Rotor Minimum Allowable Thickness After Refinish	37.0 mm	1.457 in
Rotor Thickness (new)	38.0 mm	1.496 in
Rotor Maximum Allowable Assembled Lateral Runout	0.13 mm	0.005 in
Rotor Maximum Allowable Scoring	1.50 mm	0.059 in
Rotor Maximum Allowable Thickness Variation	0.025 mm	0.001 in
Rear Brakes JD9
Rotor Discard Thickness*	18.0 mm	0.709 in
Rotor Minimum Allowable Thickness After Refinish	18.5 mm	0.7282 in
Rotor Thickness (new)	20.0 mm	0.787 in
Rotor Maximum Allowable Assembled Lateral Runout	0.05 mm	0.002 in
Rotor Maximum Allowable Scoring	1.50 mm	0.059 in
Rotor Maximum Allowable Thickness Variation	0.009 mm	0.0004 in
Rear Brakes JH6
Rotor Discard Thickness*	27.5 mm	1.083 in
Rotor Minimum Allowable Thickness After Refinish	28.0 mm	1.102 in
Rotor Thickness (new)	30.0 mm	1.181 in
Rotor Maximum Allowable Assembled Lateral Runout	0.13 mm	0.005 in
Rotor Maximum Allowable Scoring	1.50 mm	0.059 in
Rotor Maximum Allowable Thickness Variation	0.025 mm	0.001 in
Rear Brakes JH7
Rotor Discard Thickness*	28.5 mm	1.122 in
Rotor Minimum Allowable Thickness After Refinish	29.0 mm	1.142 in
Rotor Thickness (new)	30.0 mm	1.181 in
Rotor Maximum Allowable Assembled Lateral Runout	0.13 mm	0.005 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 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 specifications.