Get thud sound after applying brake
After applying brake and coming to a stop, get a thud sound like something is loose. Same sound occurs when brake is released. Had new rear rotors and brake pads installed along with new shocks. Sound still there. Any ideas?
ball joints? u joints if applicable
Can you tell if it is coming from the front or the back?
I had a '99 Silverado 1500 4x4 that did the same thing. It was a common issue, and it turned out to be the rear leaf springs moving a bit on each other, causing a slight bumping noise upon braking & accelerating. The dealer actually installed these plastic end caps onto the main leaf, and it seemed to cure the problem as it added a cushion between the two pieces of steel/leafs. That was a GM fix for that problem. I haven't had that issue with my '07 2500 HD & I tow a lot, but sounds like it could be the same issue as you checked those other things already. Is your truck under warranty?? Ask your local GM Service people about it & see what they say.
are the lugnuts tight on all the wheels? there have been times after work has been done on a vehicle, that simple procedures have been forgetten which can lead to major issues.
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