That sounds similar to what I went through..... were are you getting you alts?
Here is how mine went:
Factory Alt ~7 years 80,000 miles
1st rebuild (NAPA) - 2 Weeks 200 miles
2nd rebuild (NAPA) - 1 Week 100 miles
3rd New (NAPA) - 1.5 Years 20,000 miles
4th Rebuild (BOSCH from NAPA) - 1+ years and 9000 miles (Still on truck and working fine)
I would suspect the alternator..... the 6.0's are ******* batteries....... they take alot of power to run......
WOW!!!
I have dual alternators, neither one has given me fits..... 150k+ miles since '03... only owner. I've got the 4x4 Camper Special.
Check this out, have you heard about the trip meter reset? I haven't done it yet, but will try tonight when I get home.
It goes something like this:
Before turning on the ignition, press and hold the trip meter reset, then turn the truck to on, while holding it down. Supposedly it resets the computer, unlike the battery cable reset. It also flashes last time computer was reset and possibly codes.
Have you heard of this???
I'm hoping it doesn't do a James Bond fragging of the system!! At this point, I'll try anything that doesn't cost me a grand up front!!