HOW CAN I GET MY ALTERNATOR TO QUIT WHINING?

2007 GMC Envoy

Tiny

vettedream72

April, 17, 2012 AT 11:38 AM

I have replaced my alternator 3 times trying to get rid of the annoying whining sound. I have used original GMC alternator, after-market alternator and an "top of the line" alternator. They all whine. Does the manufacturers just not make good bindings for these alternators?

FOUND 768 RELATED QUESTIONS

5 Answers

Tiny

mhpautos

April, 17, 2012 AT 11:45 AM

Check that the belt tension is correct, if it is a serpentine belt, the auto tensioner may be faulty and not tensioning the belt correctly.

Tiny

vettedream72

April, 17, 2012 AT 11:47 AM

Brand new belt and tensioner. The tensioner is fine. Any other ideas?

Tiny

mhpautos

April, 17, 2012 AT 11:50 AM

Check all pulleys and belt alignment, does the alt noise increase with load, i.E, heater blower on and headlights on high?

Tiny

Wrenchtech

April, 17, 2012 AT 2:49 PM

Are we talking about an electrical whine that can be heard through the radio or a mechanical rumbling heard in the engine compartment?

Tiny

maynardman

May, 6, 2012 AT 3:44 PM

Check for broken or missing ground straps

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