Removal Procedure

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.

Raise and support the vehicle. Lifting and Jacking the Vehicle
Remove the rear tire and wheel assemblies. Tire and Wheel Removal and Installation (Without Dual Rear Wheels) , or Tire and Wheel Removal and Installation (With Dual Rear Wheels)
Place a large C-clamp over the brake caliper body and against the outer brake pad.
Using the C-clamp, carefully compress the brake caliper piston fully into the brake caliper bore.
Courtesy of GENERAL MOTORS COMPANY

NOTE:
Do NOT use air tools to remove or install the guide pin bolts. Use hand tools ONLY.

Brake Caliper Guide Pin Bolt- Lower(1) - Remove
Courtesy of GENERAL MOTORS COMPANY

Brake Caliper Guide Pin Bolt- Upper(1) - Remove
Courtesy of GENERAL MOTORS COMPANY

CAUTION:
Support the brake caliper with heavy mechanic 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.

NOTE:
Do NOT disconnect the hydraulic brake flexible hose from the caliper.

Remove the brake caliper and support with heavy mechanics wire.(1) Rear Brake Caliper Replacement (JH6) , or Rear Brake Caliper Replacement (JH9)
Courtesy of GENERAL MOTORS COMPANY

Rear Brake Caliper Guide Pin- Upper(1) - Remove
Courtesy of GENERAL MOTORS COMPANY

Rear Brake Caliper Guide Pin- Lower(1) - Remove
Courtesy of GENERAL MOTORS COMPANY

Rear Brake Caliper Guide Pin Boot(1) - Remove[2x]