GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 177408  Size: SH
  1. Remove the retainer and the electrical connector (2) from the fluid level sensor.
  2. Drain the brake fluid from the master cylinder reservoir.

  3. Object Number: 176838  Size: SH
  4. Tap back the pins until clear of reservoir. Be careful not to damage the reservoir or master cylinder. If needed, loosen or remove the strut cross bar for access; refer to Front Suspension.

  5. Object Number: 153127  Size: SH
  6. Remove the reservoir.
  7. Remove the seals.
  8. Inspect the reservoir for cracks or deformities. If found, replace the reservoir.
  9. Clean the reservoir with clean denatures alcohol and dry the reservoir with unlubricated compressed air.

Installation Procedure


    Object Number: 153127  Size: SH
  1. Lubricate the new seals and the reservoir bayonets with clean brake fluid.
  2. Install the seals, making sure they are fully seated.
  3. Install the reservoir onto the master cylinder by pressing straight down by hand until pin holes are aligned.

  4. Object Number: 176838  Size: SH
  5. Tap in pins to retain reservoir. Be careful not to damage the reservoir or master cylinder. If strut cross bar had been loosened or removed, reinstall; refer to Front Suspension.

  6. Object Number: 177408  Size: SH
  7. Fill the master cylinder reservoir to full level mark using only Delco® Supreme II Brake fluid, or equivalent DOT 3 brake fluid, as specified in Maintenance and Lubrication.
  8. Install the electrical connector (2) to fluid sensor, and secure with the retainer (1).
  9. Bleed the hydraulic system. Refer to Hydraulic Brake System Bleeding .