05 grand prix, When it gets below 30 degrees outside it will not start. Battery shows 12.5 on a voltage meter but when i jump it with my truck it starts....anyone?

Asked by Feb 25, 2016 at 08:14 PM about the 2005 Pontiac Grand Prix Base

Question type: Maintenance & Repair

3 Answers

112,405

Sounds as if your alternator may not be charging the battery. The batrery should have 14.5 volts...

3 of 3 people found this helpful.
112,405

Have the battery load tested and the alternator load tested as well...

3 of 3 people found this helpful.

I'm going to get the battery checked out today. ..thanks for your help

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