"I'm not sure how it would hold up with a really hot tune or a lot of weight, but his other son has a CC/SB 2006 Duramax truck with Quadrasteer. It's been holding up fine with a tune that is probably low 400 HP to the wheels for about 6 months."
What's the trick to making the quadrasteer work? Do you have to start with a gas truck that came with quadrasteer, then convert it to Duramax? My gut tells me that the BCM has a lot to do with getting it all to work...