One problem related to underbody shield has been reported for the 2005 GMC Sierra. The most recently reported issues are listed below.
The rear upper frame mount for the shock absorber failed due to corrosion. The non-paint rubberized coating placed on the entire frame of this vehicle is flaking off and exposing the bare steel to the elements. The frame of this vehicle has more rust than should be expected on a 50 year-old truck but it is less than eight years old. The truck is well taken care of and the body shows no signs of rust. The failure of the non-paint rubberized frame coating has rendered this 2005 Sierra un-drivable.
| Structure problems | |
| Underbody Shield problems | |
| Door Hinge problems | |
| Door problems | |
| Body problems |