Take a look at your starter. there is a good chance the bendex is stuck (start cylinod) and is spinning the starter on the fly wheel/ flex plate. the best way I can describe it is a weeeeeeeeee sound and when you turn the engine off it sounds like a jet airplane shuting down.
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Re: 2004 trailblazer winding noise in engine
Well sir this definately sounds big, and of course all of these answers
help u a lot if u know a lil bit more than oil changing ure
self.....well if ure noise doesnt die out after a lil while, than that
means its comming from something turning and it could be just a wornout
pulley, to something complicated like replacing ure belt(s)...ill just
mention to check anything, or ure best buddy or anyone with automotive
knowledge before replacing any parts. sometimes tighting ure belts a
lil will do the job,......
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Assuming no differential work was done because those ratio's must stay the same. Gear wind up is what causing the problem make sure all tire size's are equal. If had fluid replacement I hope you had the quad-trac fluid installed in transfer case. It is purple fluid and aftermarket has no equivalent.
Sounds like a constricted IAC Idle air control valve passsage. Fairly simple to fix. Remove air filter trunking all the way to the throttle body to allow access. The IAC allows air passed the throttle when closed at idle. Just on the inside of the throttle body in front of the throttle flap there is an opening in the throttle wall. This is the air inlet to the IAC; there is an outlet similar on the other side of the throttle. Use carb cleaner and cloth to shift the grime from this tubing and get it like new. Hold the throttle flap open to get at both ends of the IAC tubing. The IAC can be detached and cleaned to a shine. Reinstall the IAC and replace all air pipe ducting. Leave for about 20 minutes to allow any cleaner residue to dry out. When you restart you might experience a bit of uneven running but this will disappear very quickly as the last of the cleaner dries out
I went to the dealer to check on the price for the idle pulley and they said that was waht the problem was. The quote from them was $99 for Labor and $38 for the pulley..Solution $18.00 at the parts store and 20 min from my hubby and it is fixed. The only problem with the pulley form the auto parts is that the original washer won't fit in the hole so we had to but a seperate washer. Runs great now I just have to find a solution to the gas gauge and fuel sensor.