I bought a used 2011 6.7 3500 laramie with 82 000 km this summer. It seems to me that it doesn't have as much power as I expected. When going up hills that are not terribly steep maybe 5 percent grade or less i have the pedal to the floor in order to maintain 100 km/hr while the truck is empty not towing. Truck shows no codes or anything. There is a sticker under the hood showing that the ecm was flashed by the dealer at some point. Everything is stock on the truck except tires which are 33". Is it really this gutless stock and needs deletes or is there something more?
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