OEM Chevrolet Uplander Brake Calipers

Chevrolet Uplander Brake Calipers Parts and Q&A

• Caliper, Rear Driver Side
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  Q: How to overhaul the rear brake calipers on Chevrolet Uplander?

  A:

  The repair must start with proper shielded work areas that handle brake fluid irritants before dealing with brake fluid's paint and electrical interference risks. Unload the caliper unit from the car. A new brake caliper assembly must replace the defective unit because the integral park brake actuator shaft seal cannot be serviced. Insert a wooden or plastic implement to remove the seal retaining ring from the brake caliper assembly before draining its fluid contents. Put a wood block on the inner caliper housing opposite the piston and push out the piston using low pressure compressed air through the caliper inlet. Take out the piston dust boot seal and extract the piston seal from the caliper chamber to discard both components. Check the park brake system from the outside by moving the brake lever. Keep the mechanism in place and order a new brake caliper when the system gets stuck. Always protect the Brake Caliper Piston surface when installing and replace the assembly before it shows damage such as cracks, scoring, pitting, or severe rust. Apply fine emery paper to fix rust or light corrosion areas on the assembly. Replace it with a new piece when these attempts fail. Clean the caliper parts with denatured alcohol followed by filtering non-lubricated air to dry them. When inspecting the caliper piston always check whether damage is present and replace it if found. Also analyze the caliper mounting holes for any similar damage. Install a lubricated piston seal in the caliper borde by applying delco supreme ii® (GM P/N 12377967 or Canadian P/N 992667) or equivalent dot-3 brake fluid. Put the new dust boot seal onto the caliper piston and place the piston into the bore. Turn the spanner-type wrench clockwise until the piston fits completely. Make sure the dust boot seal fits properly in the counterbore space before placing the retaining ring. Place the brake caliper on the vehicle after installation but check for leaks before bleeding the hydraulic brake system. Replace the entire piston assembly if you find leaks from the front past the piston dust boot seal due to its non-repairable adjustment mechanism seal.
• Caliper
  88964172
  Q: How to replace the front brake calipers on Chevrolet Uplander?

  A:

  Before installing the front brake caliper inspect the brake fluid in the master cylinder reservoir and drain fluid when the level reaches halfway between highest tolerance and lowest safe level. For starting the work lift the vehicle and take out the tire and wheel assembly. Apply two wheel lug nuts to keep the rotor in place on the hub before using a large c-clamp to push the Brake Caliper Piston into the bore through tight pressure against the back of the outboard Brake Pad. Separate the brake caliper from brake hose and take out the two copper brake hose gaskets found on the caliper or hose ends for replacement. Seal off both brake caliper and hose holes before you clean the area close to the brake hose fitting. Separate the brake caliper bolts to remove the brake caliper assembly from its bracket. Check caliper pin boots for any damage and replace them when worn out. Also inspect the caliper pins for rust buildup and replace them at that time. Fix the caliper bolt boots right and hang the caliper onto its bracket. Then secure the Brake Caliper Bolt at 54 nm (40 ft. Lbs.). Install replacement gaskets on aluminum brake hose hose ends then use the bolt with new gaskets to assemble it onto the brake hose side and bolt it at 54 nm (40 ft. Lbs.). Position the tire and wheel after you unthread and remove the rotor hub nuts. Add brake fluid until the cylinder is full and perform brake system bleeding. Use the j 28662 brake pedal effort gage for ten seconds to measure 778 nm (175 ft. Lbs.) of brake pedal force and check for hydraulic system leaks at the brake caliper and braking components.