freeman Posted March 14, 2008 Report Share Posted March 14, 2008 I have a whining noise about 1500-2000 rpms, you cant hear it above or below other rpms, like a winding noise, its not constant though it has like a lope to it. Its not very loud either. Any ideas as to what it might be? Quote Link to comment Share on other sites More sharing options...
yttaf Posted March 14, 2008 Report Share Posted March 14, 2008 I have something like that when I let off the gas & then it quits when I push the pedal again. Quote Link to comment Share on other sites More sharing options...
Fireman31 Posted March 14, 2008 Report Share Posted March 14, 2008 my guess is that its the front diff Quote Link to comment Share on other sites More sharing options...
freeman Posted March 14, 2008 Author Report Share Posted March 14, 2008 forgot to add one thing, it doesn't do it all the time. Like when its cold I dont head it, but after the trucks been running, I do hear it. Quote Link to comment Share on other sites More sharing options...
dawgbone Posted March 14, 2008 Report Share Posted March 14, 2008 (edited) Probably not at all what you're describing as mine does it when in Park. But I too have a certain whine, almost like a vacuum type whine....But I'm almost certain that it's actually my intrument cluster, or more over, my tach servo....I thought it was coming from my tweater(bleeding through my radio), but nope.... Just throwing it out there Edited March 14, 2008 by dawgbone (see edit history) Quote Link to comment Share on other sites More sharing options...
Black2003SS Posted March 14, 2008 Report Share Posted March 14, 2008 NO radix by chance? Thats what causes my whine in my engine bay. I would think more likely that your diff might be starting to go. Quote Link to comment Share on other sites More sharing options...
freeman Posted March 14, 2008 Author Report Share Posted March 14, 2008 (edited) NO radix by chance? Thats what causes my whine in my engine bay. I would think more likely that your diff might be starting to go. I wish my truck currently has 45k and its been doing it since I got it in the beginning of January. Edited March 14, 2008 by freeman (see edit history) Quote Link to comment Share on other sites More sharing options...
NashSS Posted March 15, 2008 Report Share Posted March 15, 2008 Not sure what this is but Im curious as well and I know its not the front diff cuz I know what sound that makes cuz it humms too but this sound is like supercharger whine just without the supercharger. Could it possibly be the water pump? Quote Link to comment Share on other sites More sharing options...
Fireman31 Posted March 15, 2008 Report Share Posted March 15, 2008 Could be the alternator, my alternator has made a small whining noise since the truck was new. Quote Link to comment Share on other sites More sharing options...
freeman Posted March 15, 2008 Author Report Share Posted March 15, 2008 yea it does sound like a supercharger, but like I said, it has a lope to it, instead of a solid whine like a supercharger. Im gonna see if there is any way to record it so you guys can understand better. Ill prolly start small with stuff like the tension pulley and see if that helps. Quote Link to comment Share on other sites More sharing options...
BlackSS04 Posted March 16, 2008 Report Share Posted March 16, 2008 i'm in the same boat as you. i hear it when i'm accelerating and then it stops at a point when the exhaust overcomes the sound of the whine. it does sound like a low frequency whine from a blower. what the hell is it? and i am also starting to hear a rattling or a faint clanking noise coming from the engine bay, and i have my check engine light on for the 02 sensors. sorry for the rant, just a little aggrivated now that i actually thought about it. should i put the stock tune back in and take it to chevy to have em look at it? the truck does seem to be running fine though. Quote Link to comment Share on other sites More sharing options...
Badkarma Posted March 16, 2008 Report Share Posted March 16, 2008 powersteering or the alt. its even worse with electric fans. You dont have a loudars mechanical fan going so you hear alot more accesory noise Quote Link to comment Share on other sites More sharing options...
bobwrench Posted March 16, 2008 Report Share Posted March 16, 2008 Pull the accessory drive belt and take it for a quick(SHORT!!!) drive. If it's gone, cerefully inspect and spin all front of engine accessories by hand. A rough bearing can usually be quickly found. Bob Quote Link to comment Share on other sites More sharing options...
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