Ok people I will tell you how I fixed my Silverado to make it good enough to drive , it is not perfect but way better than the shaking dog I was driving !!! One day the steering wheel was shaking to no end , I pulled off the road to a dead stop and switched the 4 wheel drive selector to automatic , I then took foot off the brake and the truck went forward , I switched the 4 wheel drive selector back to 2 wheel drive and started speeding up 67 good , 68 good , 69 good ,70 good , 71 good , 72 good , 73 and smooth as glass !! Now people this hunk of junk was shaking like a wet dog on I 77 before I pulled off the road ! I also upped the air pressure in my tires about a week later to 40 PSI , truck rides rough but have not had the big shaking of late