Position: Grooved Pulley. 2006 GMC Savana 2500 Engine: 6.6L V8 DIESEL; W/O A.C.; Position: Grooved Pulley;. 2007 GMC Savana 2500 Engine: 6.6L V8 DIESEL; W/O A.C.; Position: Grooved Pulley;. 2008 GMC Savana 2500 Engine: 6.6L V8 DIESEL; W/O A.C.; Position: Grooved Pulley;.