2011 GMC Sierra Axle Differential Bearing Kit Sierra 2500 HD - 4WD - GM 9.25 in. IFS - Bearing and Seal Kit - Incl. Pinion Bearings/Carrier Bearings/Crush Sleeve/Pinion Seal - Front guaranteed to replace your current 2011 GMC Sierra Axle Differential Bearing Kit Sierra 2500 HD - 4WD - GM 9.25 in. IFS - Bearing and Seal Kit - Incl. Pinion Bearings/Carrier Bearings/Crush Sleeve/Pinion Seal - Front. 2011 GMC Sierra Axle Differential Bearing Kit comes new OEM 2011 GMC Sierra Axle Differential Bearing Kit aftermarket new 2011 GMC Sierra Axle Differential Bearing Kit of remanufactured 2011 GMC Sierra Axle Differential Bearing Kit Sierra 2500 HD - 4WD - GM 9.25 in. IFS - Bearing and Seal Kit - Incl. Pinion Bearings/Carrier Bearings/Crush Sleeve/Pinion Seal - Front.