I have recently purchased a 1999 GMC Yukon 4X4 and notice a jiggle I can't
get rid of.
65-75 mph is most noticable and almost non-existant at any other speed.
Feels like a wheel(s) is out of balance. If you can believe it, it
actually gets 10 times worse if I roll the back windows down.
In an attempt to remedy the bounce, I have new tires (Big-O Bigfoot A/T
LT265/75R16) on stock rims. New shocks. The tires have been balanced 3
times, the most recent on a Load Force Balancer. This actually seems to
have made it a tad better. Alignment is fresh and the Idler Arm was just
I have seen some info regarding motor mounts and possible drive shaft
Does anyone have any more info? I find super strange that is gets worse
with the rear (only) windows down. It leads me to believe it could be a
driveline or structure issue.
Any input is appreciated.