I have a 2006 Envoy, 4.2 liter, four wheel drive. The left door panel attach point behind the switch panel has broken. Is there a way of repairing this plastic bracket? If not repairable where can I get replacement door panel.

Super glue or junk yard.

Yeah, super glue, especially if you have all of the pieces. Junkyard can be more iffy, especially if it is a common place for a panel to break.