When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Had the new flash on my 03 with 34,000 miles three weeks ago (only because of hard 2-1 downshifts in the tow/haul mode). 365 mile roundtrip to the Flaming Gorge with 7,400 lb boat via I-80 up the notorious hills known as the "three sisters" with no problem maintaining 70 mph- Could easily have gone faster up the hills but as George H always said: It wouldn't be prudent.
Comfortable temps in the mid 80's. Averaged 11.8 mpg including unloading & loading the boat etc. Interesting fact that the truck does not put out much black smoke, even under load. I use fuel additive Diesel Kleen occasionally and always purchase my fuel from the same Flying J station which has the lowest price and appears to be a very high volume dealer. I could not be more pleased with this truck- Pulls like a Big Dog and rides better than a Cadillac.