Quote:
Originally Posted by Karr
I threw a voltage stabilizer on the battery and it actually helped somewhat. Maybe I don't have enough juice?
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Typically with a GM the flickering lights is caused by a bad solder connection on the BCM (hair line fracture).
Being that you checked it, I'd say your Alt isn't supplying enough current during idle. Eventhough you might have a 110 amp alt. most don't supply that kind of current at idle. Add an underdrive pully and the problem gets worse.
Make sure you have a good chassis to engine ground as well
Also, the Auto Zone checks is usually at speed and doesn't check the full range. You need to check the alt. output with an oscilloscope. I had a bad alt that tested good at Auto Zone but when I hooked it up to my analyzer the ripple was bad.