Hello fellow Chevy owners, Awesome club!. I have a 1995 GMC Yukon. I just recently got both U-Joints and rear and front seals replaced because of a leak. I thought that this would fix the problem of vibration, but it didn't work. I took the truck back and they balanced the drive shaft which seemed to work a little better although a vibration remains at the speed of 120 km's per hour. I would overlook this vibration but it is horribly annoying. Could anyone help me out with this? suggestions? What other things should I look at? Please help, any reply would be humbly appreciated. A fellow Yukon enthusiast.