Thanks Jerry. I just retired so I won't put very many miles on it except for the Alaska trip we're planning for next year. The truck has a 6.2 with 3.73 gears. It has more bells and whistles than I really care for.
I had to travel about 340 miles to get it and pulled a Mazda 3 back. The Mazda and tow dolly probably weighed a little over 3,000 lbs. The terrain varied from flat to rather hilly. I know that's not nearly what my camper weighs but I was impressed with how it pulled. It was showing 13.8 mpg average on it. I guess that was a lifetime average and I didn't know how to set it for just the trip so I left it there. Before I got home it had raised to 13.9 mpg. I know the milage guages are not accurate but I gave it just for reference.
I put it in tow haul, locked 6th gear out and set the cruise. My gps was showing 63 and 64 mph. When I went through the hilliest part of my trip on I-71 between Cincinnati and Louisville it never dropped out of 5th gear.
It has a gooseneck hitch installed on it right now and I was considering leaving it on but since I already have a 5th wheel hitch I'm pretty sure I'm going to change it out. I just don't want to take the chance of stressing the pin box welds.
I'm looking forward to getting the hitch mounted and getting on the road again.