Well yesterday I was driving my truck in Colorado when I was in four wheel drive and I had just taken it out of Tow Haul mode going 45 in the snow when the engine light came of and the truck had no power. Extremely slow exceleration. And excelerating from a stop was just rediculas. The transmission was shifting very hard and reving the engine at 3000 RPMs with very little to show for it! I have done about 3000miles in the last 2 weeks! Does anyone know what the problem could be? HELP!!