Look for any object that may be in the way of the belt, if you cannot find anything take the belt that you have in to the parts store and ask for one that is about 1/4 to 1/2 an inch smaller and make sure you put it on tight. if there isn't enough of the belt you have left to match the size, then set your alt in the middle of the tension adjustment take a string and route it as the other belt was and bring that into the parts store and tell them that you need a belt that size. if the alt is not your tensioner then when you route the string subtract an inch from the total size of the string and get that size. the belt that you had was most likely too loose slid over and died. I hope this helps.
I’m happy to assist further over the phone at https://www.6ya.com/expert/brock_d67526d2a834c47e
Your Pulleys Are Not Aligning Up With the Belt - Until they are Aligned You Will Eat Up The Belts / And Yes You Can Re rout To Be Without the AC , But The Pulleys Have To Align
SOURCE: 2003 Tahoe (5.3). AC belt/tensioner/compressor (Chatters)
The compressor is bad. I have the same problem. Apparently none of the tahoe's compressors are worth a ****! im having to replace mine too. You have to change the compressor, the accumulator/dryer, orifice tube and flush the lines. If you look on ebay you can buy a complete kit to change it all for about 300 bucks. The dealership tells me that you need to change the fan clutch as well. They told me that the reason for the noises is the fan clutch isnt working properly and it lets the compressor get too hot causeing higher pressures in the compressor due to the heat. They called it liquid slugging I believe. Mine doesnt break the belt but when you give it very much gas it makes a squeal and then a grinding noise like your trying to put a standard transmission in gear with it running without pushing in the clutch. I asked if you could just change the fan clutch and they told me no its too late, you have to change the compressor and dryer/orifice tube.
SOURCE: SuburbaNn AC problem
check your air gap on the compressor pulley where the clutch and pulley meet. you should be able to fit a postcard in between it. if thats good then check your tensioner. there should be lines on it to tell if its wore out
SOURCE: when AC is on huge loss of power
About 3 to 4 HP is lost which is normal, not HUGE !! If it is HUGE you may have a falthy Compressor.
SOURCE: Hello. I am having constant problems with my 1997
has anyone checked the tensioner and pulley.th etensioner should operate smooth and without any side play. if the belt is too long, the tensioner will not be able to pull out the "slack" in the belt. the tensioner will have a mark of where it should be with the correct length belt on it.
SOURCE: AC compressor won't come on
check end of connector with test light to see if its getting power
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