Part Type: Accessory Drive Belt Idler Pulley. Belt Idler Pulley. 1996 GMC Savana 1500 Engine: 4.3L V6; For Vehicles w/o Air Conditioning; Position: Grooved Pulley;. 1996 GMC Savana 1500 Engine: 5.0L V8; For Vehicles w/o Air Conditioning; Position: Grooved Pulley;.