A brake squeal condition may be heard on some 2020-2022 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD models. (Fig. 15) The brake noise may caused by the lining shim friction material used on the brake pads.
To reduce the potential for brake noise, new brake pads are available that use an improved lining friction material that is less susceptible to noise concerns.
Fig. 15
Replace the front and rear brake pads with the new pads if there is a brake noise concern. Current parts in inventory are the updated design.
To increase the effectiveness of the new brake pads, a brake burnish should be performed during the test drive after installation to properly prepare the pads to the rotors. Refer to Brake Pad and Rotor Burnishing in the appropriate Service Information.
TIP: If the pads are replaced and the squeal sound is still present, check the orientation of the pads. Each brake pad has an Inner or Outer designation to indicate where it should be installed. (Fig. 16) If the inboard and outboard pads are installed in the wrong location, it can result in brake noise.
Fig. 16
During installation, keep in mind that only the left side of the truck has the wear sensors, which are mounted on the inner pad. (Fig. 17) Refer to Front and Rear Disc Brake Pads Replacement in the appropriate Service Information.
Fig. 17
Refer to Bulletin #20-NA-020 for more information and the new brake pad part numbers.
– Thanks to Kevin Minor
