2001 GMC Sierra Differential Carrier Sierra 2500 HD - 4WD - GM 10.5 in Rear - Yukon Grizzly Locker - 30 Spline - Installs into Standard Open Carrier Case - Diffenetial has 14 Bolt Cover & Removable Pinion Support - Rear guaranteed to replace your current 2001 GMC Sierra Differential Carrier Sierra 2500 HD - 4WD - GM 10.5 in Rear - Yukon Grizzly Locker - 30 Spline - Installs into Standard Open Carrier Case - Diffenetial has 14 Bolt Cover & Removable Pinion Support - Rear. 2001 GMC Sierra Differential Carrier comes new OEM 2001 GMC Sierra Differential Carrier aftermarket new 2001 GMC Sierra Differential Carrier of remanufactured 2001 GMC Sierra Differential Carrier Sierra 2500 HD - 4WD - GM 10.5 in Rear - Yukon Grizzly Locker - 30 Spline - Installs into Standard Open Carrier Case - Diffenetial has 14 Bolt Cover & Removable Pinion Support - Rear.