Silverado Sierra Driveshaft Center Support Bearing HB88532

This is a pre-assembled driveshaft center support (carrier) bearing for GM trucks with a two-piece rear driveshaft. Listed fitment is 1999-2011 Chevrolet Silverado 1500 and 2500 HD and 1999-2011 GMC Sierra 1500 and 2500 HD. It replaces HB-88532 and GM 31024698. The bearing comes pressed into its rubber isolator and steel bracket with mounting studs.

The rubber isolator around the bearing cracks and sags with age, which lets the front half of the driveshaft move. Typical symptoms are a clunk when shifting into drive or reverse, a shudder when pulling away from a stop that fades at higher speed, and a rumble from under the cab that follows vehicle speed. Push the driveshaft up and down next to the bearing; if the bearing moves in the rubber or the rubber is torn, replace it.

Mark both driveshaft halves and the slip joint so the phasing goes back the same way. Unbolt the rear half at the pinion, separate the slip joint, remove the bracket nuts and pull the front shaft. Press the old bearing off the shaft, press the new assembly on against the shoulder, and reinstall with the marks lined up. Getting the slip joint phasing wrong causes a vibration, so check the marks before tightening the bracket.