2007 GMC Envoy Repair Question
Topics covered: Alternator, Engine, Engine compartment.
Mileage: 89,000 miles.
Mileage: 89,000 miles.
Asked on April 17, 2012
How can I get my alternator to quit whining?
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?
Asked by vettedream72Answer
Replied on April 17, 2012
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.
Replied on April 17, 2012
Brand new belt and tensioner. The tensioner is fine. Any other ideas?
Replied on April 17, 2012
check all pulleys and belt alignment, does the alt noise increase with load, i.e, heater blower on and headlights on high?
Replied on April 17, 2012
Are we talking about an electrical whine that can be heard through the radio or a mechanical rumbling heard in the engine compartment?
Replied on May 6, 2012
check for broken or missing ground straps