The fuses locations you requested for your 2004 Buick Rendezvous are as follows: A/c & heater control - IGN3HVAC and IP MDL in the center console fuse box. The rear defroster fuse is RR DEF, also in the center console.
RepairPal Certified shops can diagnose and repair your 2004 Buick Rendezvous. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.