Question about 1991 Pontiac Bonneville
Could likely be your alternator. There is the possibility that the new battery is bad as well, but it's more likely that the alternator is going bad and unable to provide sufficient charge for the battery and other vehicle components.
One way to test this is, with the vehicle running, disconnect the negative battery post connection from the battery and notice if the engine shuts off. If the alternator is good, the engine will continue running.
If you suspect the alternator is the problem, you can take the vehicle to a local Advance Auto Parts store and they will check it free of charge.
Posted on Feb 03, 2010
Testimonial: "very helpful. mechanical family friend suggested same. "
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Posted on Jan 02, 2017
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