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Disc Brake System: Specifications GMC Sierra 1500

Mechanical - Hydraulic

Fastener Tightening Specifications

Application	Specification
Application	Metric	English
Backing Plate Bolt/Nut	135 N.m	100 lb ft
Brake Caliper Bleed Screw	12 N.m	106 lb in
Brake Caliper Bolt, Front (25/3500 Series)	108 N.m	80 lb ft
Brake Caliper Bolt, Front (1500 Series)	100 N.m	74 lb ft
Brake Caliper Bolt, Rear (1500 Series w/o NYS)	42 N.m	31 lb ft
Brake Caliper Bolt, Rear (1500 w/NYS, 25/3500 Series)	108 N.m	80 lb ft
Brake Caliper Bracket Bolt, Rear (1500 w/NYS, 25/3500 Series)	300 N.m	221 lb ft
Brake Caliper Bracket Bolt, Rear (1500 Series w/o NYS)	200 N.m	148 lb ft
Brake Caliper Bracket Bolt, Front (1500 Series)	180 N.m	133 lb ft
Brake Caliper Bracket Bolt, Front (25/3500 Series)	300 N.m	221 lb ft
Brake Hose to Caliper Bolt, Front	40 N.m	30 lb ft
Brake Hose to Caliper Bolt, Rear	40 N.m	30 lb ft
Brake Rotor Screw	12 N.m	106 lb in
Rear Park Brake Bracket Bolt	61 N.m	45 lb ft
Wheel Hub Extension Nut	130 N.m	96 lb ft

Fastener Tightening Specifications

Disc Brake Component Specifications

Application	Specification
Application	Metric	English
Front Brakes (RPO JC4)
Rotor Discard Thickness *	27.50 mm	1.082 in
Rotor Minimum Allowable Thickness After Refinish	28.0 mm	1.10 in
Rotor Thickness (new)	29.0 mm	1.14 in
Rotor Maximum Allowable 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
Front Brakes (RPO's 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 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 (RPO JH1)
Rotor Discard Thickness *	27.50 mm	1.082 in
Rotor Minimum Allowable Thickness After Refinish	28.0 mm	1.10 in
Rotor Thickness (new)	29.0 mm	1.14 in
Rotor Maximum Allowable 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
Front Brakes (RPO JH6)
Rotor Discard Thickness *	36.50 mm	1.437 in
Rotor Minimum Allowable Thickness After Refinish	37.0 mm	1.46 in
Rotor Thickness (new)	38.0 mm	1.50 in
Rotor Maximum Allowable 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
Front Brakes (RPO JH7)
Rotor Discard Thickness *	36.50 mm	1.437 in
Rotor Minimum Allowable Thickness After Refinish	37.0 mm	1.46 in
Rotor Thickness (new)	38.0 mm	1.50 in
Rotor Maximum Allowable 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 (RPO JC4)
Rotor Discard Thickness *	28.50 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 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 (RPO JH1)
Rotor Discard Thickness *	18.50 mm	0.728 in
Rotor Minimum Allowable Thickness After Refinish	19.0 mm	0.748 in
Rotor Thickness (new)	20.0 mm	0.787 in
Rotor Maximum Allowable 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 (RPO JH6)
Rotor Discard Thickness *	27.50 mm	1.082 in
Rotor Minimum Allowable Thickness After Refinish	28.0 mm	1.102 in
Rotor Thickness (new)	29.0 mm	1.141 in
Rotor Maximum Allowable 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 (RPO 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 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.

Disc Brake Component Specifications