[Tankerdude]

This truck has 94,000 miles on it.
Regular maintenance front to back.
No aftermarket junk other than intake and exhaust.
No smoke of any color.
Good, strong puller. Until...

This truck seems to have developed a loss of power situation, and no dealer can seem to find the problem.

EGR replaced at Guymon, Ok. dealer.
Throttle body replaced at Trinidad, Co. dealer.
All diagnostics run clean.

This is the same truck that has pulled the same travel trailer into the highest elevations of interstate highway in Colorado and New York.

Now it can't seem to get out of it's own way.

What gives???