2003 CHEVROLET AVALANCHE 1500 Structure Problems

THE PLASTIC CLADDING ON MY 2003 CHEVROLET AVALANCHE TURNED FROM ITS ORIGINAL BLACK TO A CHALKY COLOR WITH STREAKING. THIS WAS NOT COVERED UNDER THE WARRANTY, ACCORDING TO THE DEALERSHIP. THE TRUCK WAS EXPOSED TO NORMAL ENVIRONMENTAL CONDITIONS IN ALABAMA AND TENNESSEE. *TR

PURCHASED A USED 2003 CHEVY AVALANCHE AT A DEALERSHIP IN FEB 2006 UPON SERVICING THE VEHICLE TWO MONTHS LATER WAS TOLD THAT THE CAR HAD EXTENSIVE UNDER CARRIAGE RUST. THIS CAR ORIGINATED IN MICHIGAN BUT I AM WONDERING IF IT WAS A KATRINA VEHICLE DURING AUCTION? RECENTLY HAD PROBLEMS WITH U-JOINTS WHICH HAD TO BE REPLACED. GM MECHANIC SAYS THE RUST IS EXTENSIVE AND CAUSED THIS PROBLEM IT WILL NEED A LUBE KIT TO RE-LUBE ALL THE MECHANICS UNDER THE TRUCK. NONE OF THIS UNDER CARRIAGE BODY RUST WAS DISCLOSED TO US UPON PURCHASING THE VEHICLE IN FACT THE DEALER TOLD US HE ONLY GETS THE BEST USED VEHICLES. THERE IS ALSO A PROBLEM WITH THE STEERING COLUMN WHICH MAKES A CLUNKING NOISE WHEN TURNING THE WHEEL - THE MECHANIC AT THE GM DEALERSHIP SAYS THIS IS A KNOW PROBLEM. *NM