Part Type: Accessory Drive Belt Idler Pulley. Idler / Tensioner Pulley. Pulley Type: Idler Pulley. Belt Type: Back Idler. Style: Idler / Tensioner Pulley. Notes: Grooved Pulley; w/o AC. 2007 GMC Sierra 2500 HD Classic Engine: 6.6L V8; Grooved Pulley; w/o AC;.
