TSB: GM Cradle Brace Rattle

Bulletin PIT5931B "Clunk or Rattle from Front of Vehicle on Bumps or Turns" applies to 2020-2024 Cadillac XT5, 2019-2024 Chevrolet Blazer, 2018-2023 Chevrolet Traverse, and 2017-2023 GMC Acadia vehicles.

A rattle or clunk noise may be heard coming from the front of the vehicle while driving over bumps or making turning maneuvers. It may sound like a strut, control arm, or anti-sway bar. The cause may involve the engine cradle brace mounting. The cradle brace may be loose, mispositioned, or improperly torqued. The cradle brace is a flat bar that attaches across the cradle with a bolt at each end.

Remove the cradle brace and drive the vehicle over bumps/conditions where the rattle was heard previously. If the noise is gone with the brace removed, simply reinstall the brace and torque the bolts to specifications. Simply torquing the brace may not resolve the issue. The brace must be removed, reinstalled, and then torqued.

Note that the brace bolts are torque-to-yield and are one-time-use bolts. Always install new bolts.

Information courtesy of Sun Collision