OK for those that don't know I have an 06 GP GXP with the 5.3L LS4. Now lately I've been having a problem with the voltage in the system fluctuating from 15.2 (which used to be around where the normal was for my car before this problem) to 12.5 is as low as I've seen it go. I have had the battery tested as well and every time it turns out fine.
So my question is could the regulator in the alternator be going bad? Even though it is computer controlled. When the bower goes down to under 13 it comes up on the DIC and says power saver mode activated!
Before I went to Cali 3 months ago I would start the car and it would start off at the normal it always had then over about a minute it should slowly go down to 13 then when I came back (it set without getting started for 6 weeks) it started just fluctuating like it is now
Opinions ideas. And yes Saturday we disconnected all the connections and made sure they were spotless and clean
