2001 GMC Yukon XL 1500 Q&A
2001 GMC Yukon XL 1500 Question: AC tensioner pulley rattles
The noise occurs off and on when the air is on, it is a very loud rattling that makes you thing something is falling apart.I put on a new trnsioner pulley and no change, put on a different used working compressor no change. The air always works and blows cold air. The surpintine belt is new because it breaks belts at times. I got through the summer and now it will do it with the defrost on. - Stroker 1972
I have seen this problem on some 2002-2003 GMC Yukons, so this may or may not apply to your vehicle. What I have seen is the load of the compressor causing the belt and tensioner to jump, hitting the transmission cooler lines causing a rattling noise. There is a service bulletin from GM for this issue #03-01-38-019A. But again, it does not specifically apply to the 2001 model year. The repair is to replace the compressor with an updated unit and install an inline filter. If you can verify you have the exact symptoms as I have described you may still have an issue with your compressor. Perhaps discussing this issue with your local GM parts supplier would be a good idea. They may be of help in determining it the 2001 and 2002 compressors are the same, if so perhaps you could try the updated compressor in your Yukon. - Jim Taddei
Hello friend, I have the very same rattle and now i am concerned as to what to do. what was the ultimate fix for your situation. - Visitor
A rattling noise may develop from the AC belt tensioner. This can be caused by an internal fault with the AC compressor, AC performance may also be diminished when this occurs. Our technicians ...