Bonneville, LeSabre, Park Avenue 2000-2005

Brake Pads

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Removal & Installation



  1. Remove brake fluid from the master cylinder reservoir until the reservoir is approximately 1 / 3 full. Discard the removed fluid.
  2.  
  3. Remove the front wheel. Mark the position of the wheel to the wheel studs, prior to removal, for installation reference.
  4.  
  5. Install 2 lug nuts to retain the rotor once the caliper is removed.
  6.  
  7. Remove the caliper mounting sleeve bolts. Support the caliper out of the way using wire. DO NOT disconnect the brake hose or allow the caliper to hang from the brake hose.
  8.  
  9. Remove the outboard pad by pushing it in toward the piston until the mounting tabs clear the holes in the caliper body. With the tabs clear of the holes, push the pad out the bottom of the caliper.
  10.  
  11. Remove the inboard pad from the piston by pulling the top of the pad out to disengage the retainer spring.
  12.  

To install:

  1. Before installing the pads in the caliper, the piston must be fully seated in the bore. A large C-clamp can be used to compress the piston.
  2.  
  3. Install the inboard pad in the caliper by inserting the top pad ears in first, then sliding the bottom of the pad into place until the spring clip snaps into place. Make sure the inboard pad seats flush against the caliper piston.
  4.  
  5. Install the outboard pad by lining up the tabs on the rear of the pad with the mounting holes in the caliper body. Press the pad firmly down into the caliper until the tabs snap into the mounting holes.
  6.  
  7. Clean and lubricate the caliper bolt and sleeve assemblies and install them into the caliper. Lubricate the caliper slides and mountings.
  8.  
  9. Install the caliper over the rotor and torque the mounting bolts to 38 ft. lbs. (51 Nm).
  10.  
  11. Remove the 2 lug nuts used to secure the rotor in place.
  12.  
  13. Install the wheel, aligning the marks made during removal, and torque the lug nuts to 100 ft. lbs. (140 Nm).
  14.  
  15. Pump the brake pedal several times to seat the pads against the rotor.
  16.  
  17. Refill the master cylinder using DOT 3 brake fluid only and road test to verify proper brake operation.
  18.  

V6

CAUTION
Dust and dirt accumulating on brake parts during normal use may contain asbestos fibers from production or aftermarket brake linings. Breathing excessive concentrations of asbestos fibers can cause serious bodily harm. Exercise care when servicing brake parts. Do not sand or grind brake lining unless equipment used is designed to contain the dust residue. Do not clean brake parts with compressed air or by dry brushing. Cleaning should be done by dampening the brake components with a fine mist of water, then wiping the brake components clean with a dampened cloth. Dispose of cloth and all residue containing asbestos fibers in an impermeable container with the appropriate label. Follow practices prescribed by the Occupational Safety and Health Administration (OSHA) and the Environmental Protection Agency (EPA) for the handling, processing, and disposing of dust or debris that may contain asbestos fibers.

  1. Inspect the fluid level in the brake master cylinder reservoir.
  2.  
  3. If the brake fluid level is midway between the maximum-full point and the minimum allowable level, no brake fluid needs to be removed from the reservoir before proceeding.
  4.  
  5. If the brake fluid level is higher than midway between the maximum-full point and the minimum allowable level, remove brake fluid to the midway point before proceeding.
  6.  
  7. Raise the vehicle and suitably support.
  8.  
  9. Remove the tire and wheel assembly.
  10.  
  11. Install a large C-clamp over the body of the brake caliper with the C-clamp ends against the rear of the caliper body and against the outer brake pad.
  12.  
  13. Tighten the C-clamp until the caliper piston is compressed into the caliper bore enough to allow the caliper to slide past the brake rotor.
  14.  
  15. Remove the C-clamp from the caliper.
  16.  
  17. Remove the bottom brake caliper pin bolt.
  18.  
  19. Pivot the brake caliper body upward and secure out of the way with heavy mechanic's wire or equivalent. Do NOT disconnect the hydraulic brake flexible hose from the caliper.
  20.  
  21. Install a large C-clamp over the body of the brake caliper with the C-clamp ends against the rear of the caliper body and against an old inner brake pad or a wood block installed against the caliper piston.
  22.  
  23. Tighten the C-clamp until the caliper piston is compressed completely into the caliper bore.
  24.  
  25. Remove the C-clamp and the old brake pad or wood block from the caliper.
  26.  
  27. Remove the inboard and outboard brake pads from the brake caliper bracket.
  28.  
  29. Remove and inspect the brake pad retainers.
  30.  

To install:

  1. Inspect the caliper bolt suspension boots for cuts, tears, or deterioration. If damaged, replace the pin boots.
  2.  
  3. Inspect the caliper pin bolts for damage or corrosion. Replace if damaged or corroded. Do not attempt to clean away corrosion. Corrosion is typically caused by damaged pin boots.
  4.  
  5. Inspect the caliper piston boot for deterioration, replace if damaged.
  6.  
  7. Lubricate the front brake caliper pin bolts with a thin coat of NIGLUBE® grease.
  8.  
  9. Install the brake pad retainers into the brake caliper bracket.
  10.  
  11. Install both brake pads into the brake caliper bracket.
  12.  
  13. Pivot the brake caliper down over the brake pads and into the brake caliper bracket.
  14.  
  15. Insert the lower brake caliper pin bolt. Tighten the brake caliper pin bolt to 85 Nm (63 ft. lbs.).
  16.  
  17. Install the tire and wheel assembly.
  18.  
  19. Lower the vehicle.
  20.  
  21. With the engine OFF, gradually apply the brake pedal to approximately 2 / 3 of its travel distance.
  22.  
  23. Slowly release the brake pedal.
  24.  
  25. Wait 15 seconds, then repeat until a firm brake pedal is obtained. This will properly seat the brake caliper pistons and brake pads.
  26.  
  27. Fill the brake master cylinder reservoir to the proper level.
  28.  
  29. Burnish the pads and rotors.
  30.  

V8

CAUTION
Dust and dirt accumulating on brake parts during normal use may contain asbestos fibers from production or aftermarket brake linings. Breathing excessive concentrations of asbestos fibers can cause serious bodily harm. Exercise care when servicing brake parts. Do not sand or grind brake lining unless equipment used is designed to contain the dust residue. Do not clean brake parts with compressed air or by dry brushing. Cleaning should be done by dampening the brake components with a fine mist of water, then wiping the brake components clean with a dampened cloth. Dispose of cloth and all residue containing asbestos fibers in an impermeable container with the appropriate label. Follow practices prescribed by the Occupational Safety and Health Administration (OSHA) and the Environmental Protection Agency (EPA) for the handling, processing, and disposing of dust or debris that may contain asbestos fibers.


CAUTION
Two different designs of the front brake rotors and front brake pads are used on this vehicle. Do NOT interchange first design and second design parts, or a loss of braking and personal injury could occur.

  1. Inspect the fluid level in the brake master cylinder reservoir.
  2.  
  3. If the brake fluid level is midway between the maximum-full point and the minimum allowable level, no brake fluid needs to be removed from the reservoir before proceeding.
  4.  
  5. If the brake fluid level is higher than midway between the maximum-full point and the minimum allowable level, remove brake fluid to the midway point before proceeding.
  6.  
  7. Raise and suitably support the vehicle.
  8.  
  9. Remove the tire and wheel assembly.
  10.  
  11. Install large C-clamp over the body of the brake caliper with the C-clamp ends against the rear of the caliper body and against the outboard brake pad.
  12.  
  13. Tighten the C-clamp evenly until the caliper pistons are compressed into the caliper bores enough to allow the caliper to slide past the brake rotor.
  14.  
  15. Remove the C-clamp from the caliper.
  16.  
  17. To loosen the brake caliper lower pin bolt, hold the brake caliper guide pin with a wrench.
  18.  
  19. Remove the brake caliper pin bolt.
    WARNING
    Support the brake caliper with heavy mechanic's wire, or equivalent, whenever it is separated from its mount and the hydraulic flexible brake hose is still connected. Failure to support the caliper in this manner will cause the flexible brake hose to bear the weight of the caliper, which may cause damage to the brake hose and in turn may cause a brake fluid leak.

  20.  
  21. Pivot the brake caliper body upward and secure the caliper out of the way with heavy mechanic's wire or equivalent. Ensure that there is no tension on the hydraulic brake flexible hose. Do NOT disconnect the hydraulic brake flexible hose from the caliper.
  22.  
  23. Remove the brake pads from the caliper bracket.
  24.  
  25. Remove and inspect the brake pad retainers from the caliper bracket.
  26.  

To install:


NOTE
Ensure that the caliper guide pin boots are fully seated to the caliper guide pin retaining seat of the caliper pin. Ensure that the caliper guide pin boots are fully seated to the caliper boot seal retaining seat of the brake caliper mounting bracket.

  1. Inspect the brake caliper guide pin bolts. If damaged or corroded replace the brake caliper guide bolts.
  2.  
  3. Inspect the brake caliper guide pins. If damaged, or corroded replace the brake caliper guide pin. Do not attempt to clean away any corrosion.
  4.  
  5. Inspect the brake caliper guide pin boots for cuts, tears, or deterioration. If damaged, replace the brake caliper guide pin boots.
  6.  
  7. Carefully pull outward on the caliper guide pin to ensure that the caliper guide pin retaining seat is fully seated to the caliper guide pin boot.
  8.  
  9. Inspect the brake caliper piston boot for deterioration, replace if damaged.
  10.  
  11. Install a large C-clamp over the body of the brake caliper, with the C-clamp ends against the rear of the caliper body and against an old inboard brake pad or a wood block installed against the caliper pistons.
  12.  
  13. Tighten the C-clamp evenly until the caliper pistons are compressed completely into the caliper bores.
  14.  
  15. Remove the C-clamp and the old brake pad or wood block from the caliper.
  16.  
  17. Install the brake pad retainers to the caliper bracket.
  18.  
  19. Install the brake pads to the caliper bracket.
  20.  
  21. Pivot the brake caliper downward, over the brake pads and into the caliper bracket.
    NOTE
    If reusing the lower caliper pin bolt, the threads of the lower caliper pin bolt and the threads of the caliper bracket mounting holes must be free of residue and debris prior to application of threadlocker in order to ensure proper adhesion and fastener retention.

  22.  
  23. If reusing the caliper pin bolts prepare the bolt and the threaded hole for assembly: Thoroughly clean the residue from the bolt threads by using denatured alcohol or equivalent and allow to dry. Thoroughly clean the residue from the threaded holes by using denatured alcohol or equivalent and allow to dry.
  24.  
  25. Apply threadlocker GM P/N 12345493 (Canadian P/N 10953488), or equivalent to two-thirds of the threaded length of the lower caliper pin bolt. Ensure that there are no gaps in the threadlocker along the length of the filled area of the bolt.
  26.  
  27. Allow the threadlocker to cure approximately ten minutes before installation.
  28.  
  29. Apply a thin coat of Niglube® GM P/N 18046532 grease or equivalent, to the front brake caliper guide pin.
  30.  
  31. Install the lower brake caliper pin bolt. Hold the lower brake caliper guide pin with a wrench and tighten the lower brake caliper pin bolt to 34 Nm (25 lb ft).
  32.  
  33. Install the tire and wheel assembly.
  34.  
  35. Lower the vehicle.
  36.  
  37. With the engine OFF, gradually apply the brake pedal to approximately   2 / 3 of its travel distance.
  38.  
  39. Slowly release the brake pedal.
  40.  
  41. Wait 15 seconds, then repeat steps 15 and 16 until a firm brake pedal apply is obtained; this will properly seat the brake caliper pistons and brake pads.
  42.  
  43. Fill the brake master cylinder reservoir to the proper level.
  44.  
  45. Burnish the pads and rotors.
  46.  

 
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