[padro]

I have a 09 impala with a 3.5l i have put in a new battery and a rebuilt alt. and still wont go over 12.5 volts after 30 min of running the car dies and has a dead battery. I have pulled the alt. and had it tested and they say its fine:WTF: any help would be great

 

[auntjemima]

If you have a working alternator and a new battery I would think there is major draw on the battery OR the alternator is incorrectly hooked up.

 

[auntjemima]

Or the alternator is not sufficient for what you require (subs etc)

 

[Bart77]

If the alternator is working off car, but is not charging on car check the fusible link it may be open. The alternator should have 12V to it at all times.

 

[ChevroletCustomerService]

Welcome to the forum, Padro! As a Customer Service representative, I'm not able to provide much in the way of do-it-yourself information, but I hope that you're finding the owner feedback helpful so far. If you ever want our assistance in locating and working with a dealership, please contact me anytime via private message on this forum.

Katie
Chevrolet Customer Service