2005 GMC Sierra Ring and Pinion Set Sierra 1500 HD - 4WD - GM 9.25 in. Front - IFS - Reverse Rotation - Ring and Pinion Set - 4.56 Ratio - Front guaranteed to replace your current 2005 GMC Sierra Ring and Pinion Set Sierra 1500 HD - 4WD - GM 9.25 in. Front - IFS - Reverse Rotation - Ring and Pinion Set - 4.56 Ratio - Front. 2005 GMC Sierra Ring and Pinion Set comes new OEM 2005 GMC Sierra Ring and Pinion Set aftermarket new 2005 GMC Sierra Ring and Pinion Set of remanufactured 2005 GMC Sierra Ring and Pinion Set Sierra 1500 HD - 4WD - GM 9.25 in. Front - IFS - Reverse Rotation - Ring and Pinion Set - 4.56 Ratio - Front.