03 suburban a/c belt tensioner

[2Sluggos]

Can someone tell me why my a/c belt tensioner flails violently while accelerating? It's so bad that the tensioner hits the tranny cooling lines that are routed underneath. I replaced the tensioner and yet it still does it and it threw a belt once. If you turn the air on and let it idle for a little bit it doesn't do it. However, sitting in a parking lot with your a/c on and idleing for 5 minutes seems a bit much. I wonder if there's a gm service bulletin on it? If anyone knows if there is a bulletin on it can you give me a bulletin number. Thanks

[dilbeez]

hello, i have the same problem....my mechanic buddy said i might have to change the ac unit itself(compressor?) it might be the bearing in the clutch that make it sticky? its driving me crazy not being able to drive with ac on! its getting hot!. if i get it fixed soon, i can let you know what they say....