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, replaced the alternator with a higher output (260a), I've replaced the positive wire from the alternator to the battery with a 1/0 copper wire properly crimped, I've verified the main ground does go through the hoop sensor thing, i've tried unplugging that sensor as well and no improvement.
My next step is to add a second battery, but I am wondering if there's anything else I can try or something I am missing? Truck runs great otherwise without any issues at all.
Thanks for the help
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, replaced the alternator with a higher output (260a), I've replaced the positive wire from the alternator to the battery with a 1/0 copper wire properly crimped, I've verified the main ground does go through the hoop sensor thing, i've tried unplugging that sensor as well and no improvement.
My next step is to add a second battery, but I am wondering if there's anything else I can try or something I am missing? Truck runs great otherwise without any issues at all.
Thanks for the help