general problems of the 2002 GMC Sierra

On two separate occasions over the past few years, this truck has had frame damage caused by rust / corrosion to the extent that it either would not pass inspection or it compromised the operation of the vehicle. More specifically, the frame cross-members have had holes rotted through them and the shock mounts have rotted from the frame. Presently, the two cross-members that go over the fuel tank have large rust holes over the fuel tank. Also, the rear crossmember has rotted areas on the top left side.