|
| Search | Car Forums | Gallery | Articles | Helper | Air Dried Fresh Beef Dog Food | IgorSushko.com | Corporate |
|
#1
07-22-2006, 09:06 PM
|
|||
|
|||
|
Probable electrical problem
Hello all, I drive a 1999 Tahoe (5.7L gas engine). I believe it has an electrical problem somewhere. When I drive it, there is a subtle but audible high-pitched whistling sound from the engine that changes in pitch with respect to the engine's rpms. It almost sounds like a turbocharger on a diesel engine. In addition, if it's at night and the lights are on, the clock display / dash lights flicker slightly. The whistling doesn't seem to exist all the time, and the lights won't flicker when it doesn't whistle.
What are the possible causes for this? I have replaced the alternator, but that didn't fix anything. Thanks, TG 
|
|
#2
07-23-2006, 06:22 AM
|
||||
|
||||
|
Re: Probable electrical problem
Sounds like the alt. I know you replaced it, but 2 things to look at.
1. What is the condition of the battery and cables? if the battery is low or there are corroded/ loose cables , the alt will have to work harder. 2. Maybe you have a bad alt....every once in a while a new part can fail
__________________
Why do you never have enough time or money to do the job right the first time, but enough time and money to do it again? Got all the certifications 25 years ASE Certified Master Technician GM WCT Yea..I work at a DEALERSHIP....got a problem with that? Want to diagnose cars like the Pros? FOR SALE: OTC Perception 2 channel Labscope (badged as a Matco Reality) This is my personal labscope that I use to diagnose waveforms, like new, comes with leads and training video PM Me for details
|
|
#3
08-27-2006, 09:12 AM
|
|||
|
|||
|
Re: Probable electrical problem
I agree with Merlin. Make sure you get a GM part. I tried Napa stuff for alt and I'm on my 5th one on for my Grand Am. You will pay a little more but its worth it. My Surb was doing the same thing as your tahoe.
|
|
 |
POST REPLY TO THIS THREAD |
 |
|
|
