So.... Last Tuesday, in NJ, GSP, Exit 157 ish, just a normal airport run, 2002 Yukon XL 6.0 LQ4 174,000 ish miles, Starts losing power - we get to the rest stop, about mile marker 152?, and it dies coasting in to a parking space. Open hood, it smells nasty in there, and I can't get it to...