Question about 1999 GMC Sonoma
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Posted on Jan 02, 2017
Run the car from the top of a hill and let it coast at your whining speed. Put it in Neutral, does the whine disappear?
If not its in the drivetrain (wheels, driveshafts, tranny)
Very unlikely to be the timing belt. If it appears at a fixed speed then its drivetrain, if it whines at fixed revs its the engine.
Most likey the transmission I fear....Tires will also make loud whining noise too though...
Posted on Jan 09, 2009
I have a few suggestions for you,
First of all, check your air filter, make sure its clean, not clogged, and doesn't need to be changed.
I don't know how handy you are, but if you are fairly handy, check the idler pulley bearings, if your not, have a shop check it out, as a last resort.
Power steering pump/fluid being low is also a possibility, but thats usually more of a lower pitched whine then what you describe.
You say once the vehicle is warmed up, the whining stops. Does Weather seem to be a factor as well?
Hope I've helped, and don't forget to rate.
Posted on Feb 25, 2009
yes low speed whine noise from the center of he vehicle is completely normal every one with the same drive train as your does it. as for jestan flushing the oil will not correct any problems that already exist but it is a good idea to prevent problems from happening
Posted on Mar 23, 2009
Yep, That was it. i followed a link to trailvoy.com and found a video with the same noise and links to how to repair. My husband fixed it yesterday and the noise is no more!! Good Luck..
Posted on Apr 26, 2009
SOURCE: Whine noise from engine
My whine sounded like the power steering pump ,but the steering was fine. I would turn the wheel and the sound never chaged found out it was the idle pulley next to the power steering pump.
Posted on Jul 15, 2009
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