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Message: <blockquote data-quote="mylows10" data-source="post: 8223402" data-attributes="member: 614593"><p>Issue is with most of the gm trucks. Mine included they can't run more than 1000 rms without straining the electrical system if stock. So you need to beef it up quite a bit.  The hifonics amps are very power hungry  and need to be fed properly  usually the big 3 will help with battery strain. But it can only do so much  same with a better battery.  You have to be able to make the power to use it  if you get my meaning   If your not going any bigger amp power wise. Then a 225 or 250 amp alt will suffice. But if you think you might want more down the road. Then get the 350 amp</p></blockquote><p></p>