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Tuesday, December 04, 2012

2003 Chevy Trailblazer Battery Light on

I have a 2003 Chevy Trailblazer and the battery light came on. It lights up on the dash and will stay on untill i take it off idle. I just had my alternator replaced 2 months ago with one from Napa Auto Parts. I took it to a local auto parts store and they tested the alternator and said it was good. They also tested the battery under load and said it was only at 75% and I should replace it. Since the battery was 6 years old, I decided I would replace the battery. After all that, nothing has changed. What could be the problem?

1 comment:

  1. I feel that the low idle is the issue at hand. I would recommend cleaning the throat of the throttle body and around the butterfly and this should allow a bit more air to flow through and increase the idle enough to engage the alternator thus turning off the bsttery light.

    Reason: Over time the throttle body can get gummed up and restrict airflow.

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