Question about 2001 Chevrolet Malibu

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I have a 1999 chevy malibu and it is over charging. I tryed a new alternator and that did not fix the problem. I tryed a new battery and that did not work either. so what do i try next

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Assuming that diagnosis of overcharging is correct, one has to be careful with replacing the regulator.
It is very easy to get a wrong regulator, older styles that have often no indication or partnumbers won't work 'cause this Malibu's regulator does some communication with the onboard computer. D748 or D749 are the ones that will work.
With this type of alternator only removing the plastic cover is needed to get access to regulator (black unit in which plug connects)

Posted on Sep 04, 2008

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What do you mean overcharging? Put a volt meter on battery...It should be about 14.5 volts. Since you already replaced the regulator (inside the alternator) The only thing left is that the new regulator is bad. Easy to paperclip through hole in back to hold brushes until fully assembled then remove.

Posted on Aug 21, 2008


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My 2009 Chevy Malibu just had a new battery put in within the last 60 days. Then I needed a new transmission. Got it fixed. Today my battery light comes on and stays on. What is this?

The light means that your battery is not being charged properly. It could be that when the transmission was replaced, they alternator belt was not put in properly or tight enough. I'd do the following:
1. Check battery connections to make sure they are clean and tight.
2. Check the drive belt to the alternator. It should be tight and not slipping.
3. If neither of the above is the problem, fully charge the battery with a battery charger so you can drive it for a while. Don't drive it without charging or you may get stranded. Don't let the battery run all the way down either or it may ruin it.
3. Check alternator output by driving to a nearby auto store or the place you had it repaired. They usually can check your charging system for free. The alternator could have decided to malfunction, although it's pretty new.
Good luck...

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1 Answer

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is the alternator working properly? generally when that light is on the car is not charging. can take it to any autozone or advance auto and they can check the alternator for you.

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