I HAVE TAKEN MY 2003 GMC YUKON XL IN FOR SERVICE ON THE AIR CONDITIONER ON MORE THAN ONE OCCASION. I RECENTLY MOVED FROM MICHIGAN TO TENNESSEE AND WHILE LIVING IN MICHIGAN I NOTICES A SQUEALING NOISE WHENEVER I TURNED ON MY AC. THE NOISE WOULD LAST A FEW MINUTES AND THEN STOP. I ALSO NOTICED A RATTLING NOISE UPON ACCELERATION WHILE THE AC WAS ON. I TOOK IT TO THE DEALER IN MICHIGAN AND AT FIRST NOTHING WAS FOUND. I AGAIN TOOK IT TO A DEALERSHIP IN TENNESSEE AND WAS TOLD THAT IT WAS A RECYCLING SWITCH, AND IT WAS REPLACED. NOW, ALMOST I YEAR LATER THE SAME PROBLEM HAS OCCURRED BUT UNFORTUNATELY, MY VEHICLE IS NOW OUT OF WARRANTY (50,000 MILES) AND I AM NOW TOLD THAT THE AIR COMPRESSOR HAS COMPLETELY FAILED. IT WILL NOW COST ME OVER $1,000 TO REPAIR ON A CAR THAT IS LESS THAN TWO YEARS OLD. *JB