Application : GMC W4500 Forward Accessory Drive Belt Tensioner Pulley. 2008-2009 GMC W4500 Forward 6.0L GAS. Part Type : Accessory Drive Belt Tensioner Pulley. DriveAlign Idler Pulleys provide OE-quality fit to passenger cars and light trucks, performing as a locked center tensioning pulley, an automatic belt tensioner pulley or an idler pulley.
