Quote:
Originally Posted by jaxgator
I am getting the "Service Charging System" message on the DIC. When this happens I notice that my voltmeter is dropping.
This only happens when my fans kick on and only at idle or very low speeds.
The voltage drops to about 13 when the low speed fan kicks on and drops sometimes below 12 when the high speed fan kicks on.
I'm guessing a bad alternator. Any other ideas?
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Possible, but your battery could be on its last legs. The extra juice for the fans could be just enough if the battery is failing. Does it do it when you turn on lights?
Lots of variables here, age of battery and driving habits are big ones. If you only drive occasionally or only take short trips your battery may be low.
Chevy batteries are shit to begin with. I put a tender on any time my 07 is to sit for more than a couple days. I got rid of my 05 because of impossible (at that time) to find battery problems