The squeal from hell!!

[rushtk]

Hello all, 99 Tahoe LS 5.7 4dr. Went through car wash now the motor is screaming. The shop has changed out the idler pulley, belt tension pulley, alternator, and 3 different belts. It sounds like it is coming from below but they say they can't locate it. 400.00 dollars and still no help but the new parts look nice... Suggestions are appreciated!!

 

[OR VietVet]

Could you describe the noise a little better? Does anything you do change it? Does it build and then just stay constant? Revving engine change it?

 

[rushtk]

Took off belt an squealing was gone. Put on a thicker NAPA belt my old gear head neighbor said to an it's gone. The shop changed out alternator, belt idler pulley, belt tensioner, an 3 belts...350.00 later a 44.00 dollar belt did it.