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Old 04-04-2024, 03:41 PM   #2
Mouse330
 
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Drives: 2011 2SS, 2006 GMC Sierra
Join Date: Jul 2019
Location: MA
Posts: 263
I'm thinking you have an internal short in the alternator. what I would do is disconnect the regulator connector (two wire) at the alternator, put a new ECM fuse in the UFB and turn the key on, Check if the fuse is blown. Also check for 3.5V or greater on the brown wire KOEO. GL
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