I have a 99 GMC Suburban and have noticed lately that when stopping it seems to make a slight "clunk clunk" sound when the truck comes to a stop. It doesn't happen when first applying the brakes at speed, but when the truck comes to a stop. I can "ease" into a stop and the sound will not occur, but any kind of force (normal braking) will re-create the sound when I come to a stop. The noise seems to be coming from the rear of the vehicle. Any ideas what this sound could be would be appreciated.
Thanks