05-10-2012, 08:59 AM
Duramax Lifetime Supporter
Join Date: Feb 2012
Like Mike L says, When I first got my LMM The fan kicked in and it was "holy shit" what is that as it roared. YUP, just the fan kicking in. Mine does it sometimes when I first start up and on long pulls up the mountains.
2008 LMM 1 ton drw crew 4x4. Iron Bull front bumper w/12,000 mile marker wench, PIAA lights, mag hy-tech trans and rear deff pans, 285s w/ rear spacers, fass fuel pump, XX performance duel filters, Banks air intake, AFE bladerunner intake manifold and turbo downpipe, PCV re-route, Supersteer tierods, leveling kit, 58gal transflow replacement tank, firestone air bags.