engine compartment noise
slopjoc
12-16-2002, 10:20 AM
1999 Silverado, 5.3 Truck has a high pitched whining noise, that sounds like a belt. We have replaced the fan belt, the belt that runs the AC, idler tensioner and alternator are new. Still can't pinpoint the noise. It seems to get worse, at a idle rather than at a higher rpm. It also only does this after it has warmed up and driven a few miles. Any ideas?
Shortbus
12-16-2002, 11:34 AM
Did you replace the idler pulley? GM part number 12555609
There is a GM bulletin about a whine noise, the bulletin in very vague
and only mentions that if it is not the belt making noise that is is a failed bearing in either the Tensioner or the Idler, since you already replaced the tens.,alt.,and belt you might try the idler. Online the part is 26.43
Hope this helps you.
There is a GM bulletin about a whine noise, the bulletin in very vague
and only mentions that if it is not the belt making noise that is is a failed bearing in either the Tensioner or the Idler, since you already replaced the tens.,alt.,and belt you might try the idler. Online the part is 26.43
Hope this helps you.
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