2014 GMC Sierra Differential Rebuild Kit Sierra 2500 HD - 4WD - GM 10.5 in. Rear - 14 Bolt Cover - Differential Rebuild Kit - Uses HM903210 / HM903249 Pinion Bearing (3.750 in. Diameter Race) - Triple Lip Pinion Seal, Fits 2.370 in. Hub Diameter. - Rear guaranteed to replace your current 2014 GMC Sierra Differential Rebuild Kit Sierra 2500 HD - 4WD - GM 10.5 in. Rear - 14 Bolt Cover - Differential Rebuild Kit - Uses HM903210 / HM903249 Pinion Bearing (3.750 in. Diameter Race) - Triple Lip Pinion Seal, Fits 2.370 in. Hub Diameter. - Rear. 2014 GMC Sierra Differential Rebuild Kit comes new OEM 2014 GMC Sierra Differential Rebuild Kit aftermarket new 2014 GMC Sierra Differential Rebuild Kit of remanufactured 2014 GMC Sierra Differential Rebuild Kit Sierra 2500 HD - 4WD - GM 10.5 in. Rear - 14 Bolt Cover - Differential Rebuild Kit - Uses HM903210 / HM903249 Pinion Bearing (3.750 in. Diameter Race) - Triple Lip Pinion Seal, Fits 2.370 in. Hub Diameter. - Rear.