8.1L secondary battery problem. Bad alternator or voltage regulator?

10

Asked by Mar 25, 2010 at 08:10 PM about the 2006 Chevrolet Silverado 2500HD LT1 Extended Cab SB 4WD

Question type: Maintenance & Repair

My 2006 Silverado 8.1l, wore out the secondary battery which sits on the back firewall passenger side after 40K miles. The battery was overheating and ready to explode. I changed both batteries out and now 2 months later the new battery by the back firewall was leaking acid/water. I got it replaced but I'm afaid I might have an over charging issue. I have to get it checked but I wonder on this year/model if I would have to replace the whole alternator or might I be able to replace just the voltage regulator? Is the VR separate from the alternator? I got a free alternator check at Advance and the read out came back with no problems, charging fine, I imagine that was not a full test of the system though, just when they hook up the generic tester machine. Any advice? Thanks!

2 Answers

10

Also the gauge on the dash reads around 14 at all times not above.

1 of 1 people found this helpful.
15

I had the same problem. I replaced the battery 2 years ago and it has been good to go ever since! The VR is in the alternator. It is not a stand alone VR!

1 of 1 people found this helpful.

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