2007 GMC Sierra Ring and Pinion Set Sierra 2500 HD Classic - 4WD - GM 10.5 in Rear - w/ 14 Bolt Cover - 4.11 Ratio - Ring and Pinion Set - Fits 3 series 4.10 & Down Carrier - Rear guaranteed to replace your current 2007 GMC Sierra Ring and Pinion Set Sierra 2500 HD Classic - 4WD - GM 10.5 in Rear - w/ 14 Bolt Cover - 4.11 Ratio - Ring and Pinion Set - Fits 3 series 4.10 & Down Carrier - Rear. 2007 GMC Sierra Ring and Pinion Set comes new OEM 2007 GMC Sierra Ring and Pinion Set aftermarket new 2007 GMC Sierra Ring and Pinion Set of remanufactured 2007 GMC Sierra Ring and Pinion Set Sierra 2500 HD Classic - 4WD - GM 10.5 in Rear - w/ 14 Bolt Cover - 4.11 Ratio - Ring and Pinion Set - Fits 3 series 4.10 & Down Carrier - Rear.