Steering Tie Rod Assembly problems of the 2007 GMC Sierra

07 GMC Sierra(new body style) was parked. When the truck was placed in reverse and the steering wheel slightly turned there was a loud pop underneath the fron end. The right front wheel would not turn when turning the steering wheel but the left would. The truck was towed to a repair shop and was diagnosed that the inner tie rod became unscrewed from the rack steering. New inner and outer tie rods were installed and the truck was re-aligned. If this had happened while driving down an interstate it may have been disastrous.