Brake System Specifications. Pontiac Grand Am 1999

For 1990-2009 cars only

Makes 🢒 Pontiac 🢒 1999 🢒 Grand Am 🢒 Brakes 🢒 Hydraulic Brakes 🢒 Brake System Specifications

Application	Specification
Application	Metric	English
Brake Drums
Brake Drum Inside Diameter New	225.25 mm	8.868 in
Brake Drum Maximum Allowable Radial Runout	0.104 mm	0.004 in
Brake Drum Maximum Diameter After Refinish	225.78 mm	8.889 in
Brake Drum Discard Diameter *	226.31 mm	8.909 in
Front Brake Rotors
Rotor Diameter	278.0 mm	10.944 in
Lateral Runout	0.04 mm	0.0015 in
Thickness Variation	0.025 mm	0.001 in
Rotor Thickness New	26.2 mm	1.031 in
Minimum Thickness After Refinish	24.9 mm	0.980 in
Discard Thickness *	24.7 mm	0.972 in
Rear Brake Rotors
Rotor Diameter	278.0 mm	10.944 in
Lateral Runout	0.04 mm	0.0015 in
Thickness Variation	0.025 mm	0.001 in
Rotor Thickness New	11.0 mm	0.433 in
Minimum Thickness After Refinish	9.85 mm	0.388 in
Discard Thickness *	9.0 mm	0.354 in
Front Caliper Bore Diameter	60.0 mm	2.36 in
Rear Caliper Bore Diameter	38.0 mm	1.50 in
Master Cylinder Bore Diameter	25.40 mm	1.00 in
Wheel Cylinder Bore Diameter	22.20 mm	0.87 in
* All brake drums and rotors have a discard dimension cast into them. Replace any drum or rotor that does not meet this specification. After refinishing the drum or rotor, replace any drum or rotor that does not meet the maximum diameter or minimum thickness after refinish specification.