Steering Tie Rod Assembly problems of the 2000 Chevrolet 1500

Consumer experienced intense shaking from the vehicle when going over bumps. He took the vehicle to the dealer, and they could not find any defects. Consumer was not satisfied to have the vehicle at home and examined it himself, finding a loose bolt connecting the tie rod. Took vehicle to chev dealer for repair twice. They replaced idler arm and inner passenger side tie rod, re-balanced tires, rotated same and aligned front end to no avail. The consumer found that the teflon nut holding the passenger side outer tie rod loosened. Only a few threads were holding the nut onto the tie rod.