I have an '05 short wheelbase Trailblazer LT with the 4.2L motor. It has an auto tranny w/4WD and about 27,000 miles on it.
It makes a whining or grinding noise that increases and decreases with engine speed and even does it at idle. Does nto matter what gear the tranny is in, it still makes the noise. It sounds exactly like the noise made when you turn the wheel on a car that needs power steering fluid. Only about twice as loud. (And yes, before you ask.I did check the power steering fluid level, the box and the lines. All look ok, no leaks and fluid level is where it should be.)
I have been told various things - fan clutch, belt tensioner, etc. I checked the serpentine belt and it looks good - no cracks.
If I open the hood, the noise generally seems to be coming from the driver's side of the engine compartment but I cannot pin it down.
Hope you can help
Monday, June 18th, 2007 AT 12:49 PM