Hi, I've been experiencing some nagging issues with this 2008 Chev Uplander with about 83,000 kilometres on it (just over 50,000 miles), for some time. VIBRATION Last year, it pulsed and vibrated while braking hard, almost scary at highway speeds. So last year I replaced the rotors and pads all around with Raybestos premium ceramic pads and top of the line Raybestos rotors. I also replaced the rear calipers as I could not squeeze them with the special turn and push tool. The pulsing and vibration disappeared and the van was braking beautifully. Now the vibration is back but it has no pulsing, and is not as bad as last year, yet. I have looked at the brakes on all the wheels. I found that the front wheel brakes look good with evenly slightly worn pads across each pad and the same thickness on both sides of each rotor. I checked the sliders, all are clean, lubed, and free. I checked the calipers, I was able to squeeze both with ease. The rear brakes also looked OK, with clean, lubed, and free sliders, and evenly slightly worn pads across each pad. I noticed the rear right inside pad was worn a little more (a bit thinner) than the outer pad. On the rear left they were the same thickness on each side of the rotor. Unfortunately I did not squeeze the calipers as I did not have the special tool to turn and squeeze the rear calipers with emergency brake cable attached. I replaced both calipers on the back last year when changing the pads and rotors as neither caliper would squeeze, so these calipers are less than one year old! Could it be that the rear right caliper has seized again? Should I borrow the tool to check it? This is the only thing I see that could cause the vibration when braking hard, but does not appear to be that bad and wonder if it could be caused by the second problem that follows! CLUNKING NOISE The vehicle has been making clunking noises at the front end for quite a long time which are progressively getting worse. The other day I jacked up the vehicle and supported it on two jack stands to try to nip this problem in the bud. I tapped on all sorts of parts to see if anything sounded strange and grappled at various components to see if anything was loose. All I could find was a tinny sound coming from the lower joint on the left anti sway bar end link. All four joints on the end links were low on grease and sealed, so I ordered a pair of very nice Moog units with grease nipples to replaced the old ones. That done, the problem persists. It clunks usually when starting out from a stop, but not usually when turning or going over bumps, occasionally lately it started doing this clunking thing also when slowing, and the noise happens more frequently. I also checked the wheels for play to check for worn hub and bearing assemblies and steering joints, but neither wheel has any play. When driving, the steering wheel is taut. To check for any issues with the CV joints, I inspected each CV joint for cracks of the boots or leaks from the boot areas, and could not find any problems there! When cruising the vehicle drives well with no veering to either side and no noises, just runs smoothly. Any and all ideas as to what may be causing either issue will be appreciated. Thanks, quickcurrent