I was on my way home tonight, the weather is about 5 degrees, and I had drove 10 miles at 70 mph stopped at a stop sign,and then i was on an on ramp, and put my foot into it pretty good like i have done many times before, and then all of the sudden my bone stock truck would not rev past 2000 rpms, and when it tried to go past 2000 rpm it would just fall on its face. so i nursed it home pulled it into the driveway, shut it off, then restarted it, and took it for another drive and it ran fine, so what made my truck go into limp mode?? tranny slip, or fuel related.I question it being fuel because the truck stop I buy fuel from is blended 70 30 plus i run power service. so should i be concerned?? thanks for any ideas