2003 GMC Sierra Ring and Pinion Set Sierra 2500 - 4WD - GM 10.5 in Rear - w/ 14 Bolt Cover - 4.56 Ratio - Thick Ring and Pinion Set - Fits 3 series 4.10 & Down Carrier - Rear guaranteed to replace your current 2003 GMC Sierra Ring and Pinion Set Sierra 2500 - 4WD - GM 10.5 in Rear - w/ 14 Bolt Cover - 4.56 Ratio - Thick Ring and Pinion Set - Fits 3 series 4.10 & Down Carrier - Rear. 2003 GMC Sierra Ring and Pinion Set comes new OEM 2003 GMC Sierra Ring and Pinion Set aftermarket new 2003 GMC Sierra Ring and Pinion Set of remanufactured 2003 GMC Sierra Ring and Pinion Set Sierra 2500 - 4WD - GM 10.5 in Rear - w/ 14 Bolt Cover - 4.56 Ratio - Thick Ring and Pinion Set - Fits 3 series 4.10 & Down Carrier - Rear.