AC NOISE 03/TAHOE. THE SYMPTOM IS USUALLY RATTLING OR EXCESSIVE TENSIONER MOVMENT ON ACCELERATION. THE CONDITION MAY BE CAUSED BY AN A/C SYSTEM WITH LIQUED SLUGGING CAUSED BY A DEFORMED RETAINER GASKET.GM RECOMMENDS REPLACING THE A/C COMPRESSOR TO RECTIFY THE PROBLEM. A TEAC. SERVICE BUULITON TAB #01139B/C WAS ISSUED BY GM. THE TITLE WAS KW NOISE RATTLE INFO PART VIBRATION PERFORMANCE WARM COLD HVAC #PI01139C 5/7 04 THE #49276 TENSIONER HAS A LONG HISTORY OF FIELD PROBLEMS OR CONCERNS. GM SHOULD HAVE RECALLED AND FIXED THIS PROBLEM, MINE IS DOING IT AND TICKS ME OFF. GM SHOULD GIVE ME A NEW AC PUMP, WITH SO MANY PEOPLE HAVING THE SAME PROBLEM. LETS GET A RECALL GOING.