LaCrosse 2006-2007

Brake Calipers

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Removal & Installation



  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Inspect the fluid level in the brake master cylinder reservoir.
  4.  
  5. If the brake fluid level is midway between the maximum-full point and the minimum allowable level, then no brake fluid needs to be removed from the reservoir before proceeding. If the brake fluid level is higher than midway between the maximum-full point and the minimum allowable level, then remove brake fluid to the midway point before proceeding.
  6.  
  7. Raise and suitably support the vehicle.
  8.  
  9. Remove the front tire and the wheel assembly.
  10.  
  11. Hand tighten 2 wheel lug nuts to retain the rotor to the hub.
  12.  
  13. Install a large C-clamp over the top of the brake caliper and against the back of the outboard brake pad.
  14.  
  15. Tighten the C-clamp until the caliper piston is pushed into the caliper bore enough to slide the caliper off the rotor.
  16.  
  17. Remove the C-clamp from the caliper.

    Click image to see an enlarged view

    Fig. Brake hose attachment

  18.  
  19. Remove the brake hose to caliper bolt from the caliper. Discard the 2 copper brake hose gaskets. These gaskets may be stuck to the brake caliper and/or the brake hose end.
  20.  
  21. Plug the opening in the front brake hose to prevent excessive brake fluid loss and contamination.
    NOTE
    Note the location of the caliper pin bolts. The leading caliper pin bolt, or top bolt, has a bushing as part of the assembly. The trailing caliper pin bolt, or bottom bolt, is a solid design.



    Click image to see an enlarged view

    Fig. Front caliper-to-bracket attachment

  22.  
  23. Remove the caliper pin bolts. Note the location of the caliper pin bolts. The leading caliper pin, or top bolt, has a bushing as part of the assembly. The trailing caliper pin, or bottom bolt, is a solid design.
  24.  
  25. Remove the caliper from the rotor and the caliper bracket.
  26.  
  27. Inspect the caliper bolt boots in the caliper bracket for damage. Replace any damaged caliper bolt boots.
  28.  
  29. Inspect the caliper bolts for corrosion or damage. If corrosion or damage is found, use new caliper pin bolts when installing the caliper.

    Click image to see an enlarged view

    Fig. Front caliper pin identification

  30.  

To install:

  1. If reusing the brake caliper pin bolts, wipe away any debris and old lubricant with a with a clean shop cloth.
  2.  
  3. Apply lubricant, GM P/N 18047666, or equivalent, to the brake caliper pin bolts. Apply a thin layer to the pin bushing and to the caliper pin bolt shank. Ensure that there is not a buildup of excess lubricant at the end of the leading caliper pin, in front of the bushing.
  4.  
  5. Install the caliper over the rotor and onto the caliper bracket.
    NOTE
    The leading caliper pin, or top bolt, has a bushing as part of the assembly. The trailing caliper pin, or bottom bolt, is a solid design.

  6.  
  7. Install the caliper pin bolts. The leading caliper pin bolt, or top bolt, has a bushing as part of the assembly. The trailing caliper pin bolt, or bottom bolt, is a solid design. Ensure that the bolt boots fit securely in the groove of the caliper pin bolts. If the boots are damaged, they must be replaced. Tighten the bolts to 70 ft. lbs. (95 Nm).
    NOTE
    Install NEW copper brake hose gaskets.

  8.  
  9. Assemble the brake hose bolt and the NEW copper brake hose gaskets to the brake hose.
  10.  
  11. Install the brake hose to caliper bolt to the brake caliper. Tighten the bolt to 40 ft. lbs. (54 Nm).
  12.  
  13. Remove the 2 wheel lug nuts retaining the rotor to the hub.
  14.  
  15. Install the front tire and the wheel assembly.
  16.  
  17. Lower the vehicle.
  18.  
  19. Fill the master cylinder to the proper level with clean brake fluid.
  20.  
  21. Bleed the brake system.
  22.  
  23. Inspect the hydraulic brake system for brake fluid leaks.
  24.  

 
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