[quickcurrent]

Alright, I just finished taking all the brake parts apart on the back end, but still I see nothing about the brakes that would cause this vibration. The rotors are clean on both surfaces, save for the rust rim around the perimeter, they spin nearly perfect, the pads are wearing evenly, the sliding pins are operating smoothly, and the caliper pistons squeeze smoothly. I doubt that any very slight rotor rotation imperfection would cause this vibration! I've done all I know of.

I have only one mechanic I trust to work on my vehicles in my area where I go to do things I feel uncomfortable doing myself. I'm going to get a set of NGK Iridium IX spark plugs (my favorite) for him to replace the OEM ones with on this vehicle (since they are a nightmare to do) and I'll see if he can nip this vibration issue in the bud for me.

Your assistance was invaluable, gmtech1, as usual. I have read about owners taking their Uplanders to their local dealers, paying a fortune to have all sorts of things done to get rid of the clunking noises, including but not limited to replacement of ball joints, steering columns, tie rod ends, and other parts and still the clunking noises prevailed on their vehicles. Your suggestion was awesome and my clunking noises are gone. If they come back, I will put some loctite on the bolts and re-tighten them, or pull them and put lock washers underneath their heads to permanently avoid this nuisance.