2009 GMC Sierra Ring and Pinion Set Sierra 3500 HD - 4WD - GM 9.25 in. Front - IFS - Reverse Rotation - Ring and Pinion Set - 5.38 Ratio - Front guaranteed to replace your current 2009 GMC Sierra Ring and Pinion Set Sierra 3500 HD - 4WD - GM 9.25 in. Front - IFS - Reverse Rotation - Ring and Pinion Set - 5.38 Ratio - Front. 2009 GMC Sierra Ring and Pinion Set comes new OEM 2009 GMC Sierra Ring and Pinion Set aftermarket new 2009 GMC Sierra Ring and Pinion Set of remanufactured 2009 GMC Sierra Ring and Pinion Set Sierra 3500 HD - 4WD - GM 9.25 in. Front - IFS - Reverse Rotation - Ring and Pinion Set - 5.38 Ratio - Front.