i have had a stupid rattle sound whenever i go over bumps, its something in the suspension for sure. the lovely people that gm are, they cant find a thing which is bull. they fix every problem that i can diagnose myself.

does anyone have any good links so i can try to figure it out

 

your hub caps


.

 

Rattle? High Pitched? It could be upper strut mounts

 

I get a rattle from the rear, believe it is the springs rubbing the bushings. There is a TSB# for the rear suspension. Only happens when I go over bumps.