Squeaking pulley?

[L-Mo99]

99 Tahoe XLT 4x4 5.7L

First let me explain when the squeak starts. After about 15 minutes of driving the squeak/squeal will start and only stops when I really step on the gas. I've tried changing the cooling fan clutch after reading a couple of forums, also changed the idler pulley, along with the tensioner and serpentine belt. None of them seemed to have made a difference. Any ideas?

 

[ivin74]

have you changed all the pulleys? if you have it could be you AC compressor going out

 

[L-Mo99]

have you changed all the pulleys? if you have it could be you AC compressor going out

I have a few more pulleys to change I was hoping I didn't have to change all of them though..if that's what it takes I'll have to do it though

 

[ivin74]

Then do a process of elimination and start changing them out. Start w the least expensive.

 

[Contend997]

Sounds like the altinator when it starts putting out it putz a strain on it and causes it to squeak and when NO strain. No squeak. Spin the altinator and see what the bearings sound like. If any sounds or rough spinning then that's your problem. I have had this happen to 2 of my tahoe altinator. But I put alot of work for my alternator to keep up

 

[RicanGM]

spray some water on one pulley at the time until you find the guilty suspect.

 

[L-Mo99]

Sounds like the altinator when it starts putting out it putz a strain on it and causes it to squeak and when NO strain. No squeak. Spin the altinator and see what the bearings sound like. If any sounds or rough spinning then that's your problem. I have had this happen to 2 of my tahoe altinator. But I put alot of work for my alternator to keep up

Sounds good I'll check it right now...

 

[L-Mo99]

spray some water on one pulley at the time until you find the guilty suspect.

Tried that and it didn't work for me

 

[Rocket Man]

Tried that and it didn't work for me

Try WD40 instead of water, one at a time while it's squealing.

 

[L-Mo99]

Try WD40 instead of water, one at a time while it's squealing.

WD40 did not work either.