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  1. I

    Lights dimming, voltage sinking

    The radio is an android tablet based touchscreen, that feeds a sundown audio audio 1200w amp, that provides a 1 ohm load to a set of dual 12's in the back. I did go ahead and install a second battery and that has helped a lot. Next im replacing the factory grounds, make sure good surfaces, and...
  2. I

    Lights dimming, voltage sinking

    I had not replaced the factory ground. Will do that today. I did go ahead and install a second battery and that has helped a lot. The volt meter on the dash will still dip when for example sitting at a light with the radio on and ac's both running, but the lights are not noticeably dimming anymore.
  3. I

    Lights dimming, voltage sinking

    No I sure don't. Its a tucson alternator unit that I installed.
  4. I

    Lights dimming, voltage sinking

    Lol... ok I'm not ignoring you as a person, but likely wont do a custom tune for just this issue. Thanks tho!
  5. I

    Lights dimming, voltage sinking

    Lights still dim when foot is off the pedal as well as while in park. If I have the ac full blast or if i have music playing I can literally watch the volt meter go down from 14+ to maybe 12 or less. I'm going to put a second battery in tomorrow and see what happens. Its not even a large amp...
  6. I

    Lights dimming, voltage sinking

    Hey everyone new guy here. First time owning a GMC/Chevy, normally I buy Fords.. I have a 2011 GMC Yukon XL 1500 6.2L Denali I've noticed the voltage goes down a lot when I'm at a light or if the music/bass is going. Lights dim, dash lights dim, etc. So far I have replaced the battery...

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