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<blockquote data-quote="SounDrive" data-source="post: 8450659" data-attributes="member: 653833">efans take a **** ton of power to run. That&#039;s why the alt size was increased in the 05+ vehicles. If you&#039;re dropping to battery voltage (12s) you really need to get a HO alt, it will only be so long before an overdriven stock alt gives out and it&#039;s also hard on your batteries to be doing that. Or you could get a $200 dual bracket from Jimmy Z on Facebook and put a second stock alt on there. I&#039;ve got one more dual alt bracket I can sell but they aren&#039;t as cheap; they are a better quality one with the belt and excitation harness included thoughAlso as mentioned before you can fit 2 g34/78 size batteries in those trucks. I want to add a second in mine at some point. Also pretty sure there&#039;s a GM part to add a third battery underneath in a tray on a frame rail. Haven&#039;t seen anyone actually do it on this forum but I believe some guys on GM forums have done it</blockquote>

[QUOTE="SounDrive, post: 8450659, member: 653833"] efans take a **** ton of power to run. That's why the alt size was increased in the 05+ vehicles. If you're dropping to battery voltage (12s) you really need to get a HO alt, it will only be so long before an overdriven stock alt gives out and it's also hard on your batteries to be doing that. Or you could get a $200 dual bracket from Jimmy Z on Facebook and put a second stock alt on there. I've got one more dual alt bracket I can sell but they aren't as cheap; they are a better quality one with the belt and excitation harness included though Also as mentioned before you can fit 2 g34/78 size batteries in those trucks. I want to add a second in mine at some point. Also pretty sure there's a GM part to add a third battery underneath in a tray on a frame rail. Haven't seen anyone actually do it on this forum but I believe some guys on GM forums have done it [/QUOTE]

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