Clank

[Gunner]

I'm getting a pronounced "clank" when I go over speed bumps etc. I'd swear it's coming from the front, sounds like right front. I went over the whole front end and there are no loose bolts and no fitting that looks (at least superficially) like there's any excessive play. No signs of interference or inappropriate wear marks.

The guy who did the brake inspection said he thought the rear coilovers felt a little loose - I haven't thought so. I have the rears off now and a quick look shows no loose parts or worn fittings.

Could it be the front pads in these monstrous Sierras? They float loose in the caliper and are held by a single top pin; I could see a bump making them bang around against the caliper or rotor. That would explain why I only hear it sometimes - the times I have my foot off the brake. (Have not had the chance to test that idea.) I can't think of a way to clamp the pads down to see if that makes the clank go away - I'll live with it as long as I know what it is, but everything I can think of for testing interferes with proper brake operation, bad bad idea...