2012 GMC Sierra 2500 HD Differential Carrier RWD - 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 2012 GMC Sierra 2500 HD Differential Carrier RWD - 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. 2012 GMC Sierra 2500 HD Differential Carrier comes new OEM 2012 GMC Sierra 2500 HD Differential Carrier aftermarket new 2012 GMC Sierra 2500 HD Differential Carrier of remanufactured 2012 GMC Sierra 2500 HD Differential Carrier RWD - 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.