GM Service Manual Online
For 1990-2009 cars only

Application

Specification

Metric

English

Booster Ratio - 2.0L

5.5:1

Booster Ratio - 2.5L

7.5:1

Booster Size -- Dual

203.2 mm

228.6 mm

8 in

9 in

Caliper:

  • Minimum Piston Diameter - Front

57 mm

2.24 in

  • Minimum Piston Diameter - Rear

35 mm

1.38 in

Front Brake Rotors - 2.0L

  • Disc Type

Ventilated

  • Discard Thickness

22 mm

0.87 in

  • Lateral Runout - Installed

0.06 mm

0.002 in

  • Lateral Runout - Not Installed

0.03 mm

0.001 in

  • Rotor Diameter

256 mm

10.08 in

  • Rotor Thickness - New

24 mm

0.95 in

  • Thickness Tolerance

0.03 mm

0.001 in

  • Maximum Allowable Scoring

0.4 mm

0.016 in

Front Brake Rotors - 2.5L

  • Disc Type

Ventilated

  • Discard Thickness

22 mm

0.866 in

  • Lateral Runout - Installed

0.06 mm

0.002 in

  • Lateral Runout - Not Installed

0.03 mm

0.001 in

  • Rotor Diameter

278 mm

10.94 in

  • Rotor Thickness - New

24 mm

0.95 in

  • Thickness Tolerance

0.03 mm

0.001 in

  • Maximum Allowable Scoring

0.4 mm

0.016 in

Rear Brake Rotors - 2.0L

  • Discard Thickness

10 mm

0.394 in

  • Lateral Runout - Installed

0.06 mm

0.002 in

  • Lateral Runout - Not Installed

0.03 mm

0.001 in

  • Rotor Diameter

258 mm

10.16 in

  • Rotor Thickness - New

12 mm

0.472 in

  • Thickness Tolerance

0.03 mm

0.001 in

  • Maximum Allowable Scoring

0.4 mm

0.016 in

  • Disc Type

Solid

Rear Brake Rotors - 2.5L

  • Discard Thickness

10 mm

0.394 in

  • Lateral Runout - Installed

0.06 mm

0.002 in

  • Lateral Runout - Not Installed

0.03 mm

0.001 in

  • Rotor Diameter

276 mm

10.87 in

  • Rotor Thickness - New

12 mm

0.472 in

  • Thickness Tolerance

0.03 mm

0.001 in

  • Maximum Allowable Scoring

0.4 mm

0.016 in

  • Disc Type

Solid

Master Cylinder:

  • Bore Diameter - Nominal

25.4 mm

1 in

  • Bore Diameter - Maximum

25.4 mm

1 in