Anyone have one with a 6.6 duramax and what kind of fuel mileage.
Thank You
Ed

My van runs 17-19 depending on my driving. I do a lot of in town and some short highway. I do the same driving it seems all the time so my milage is very consistant. I have roof racks that don't help and I am loaded with tools and stock.
I have a best of 22.5 on the highway running 70-75 which is very good I think. Worst tank I think was 15 and was with way to much idle time.

On Winter fuel I have been getting 20-21.

thank you for the response

My dad drives for a parts store in one and he has been avg right around 19.5 on winter fuel. Most of his driving consists of 60-65 or 65-70 depending on what route he has. He also lets the van warm up for about 10-20 min each morning/longer when it was colder. He is ready to see what he will get on summer fuel. They get a bonus based on how much fuel they use(if they stay under their allowance)

I have been as low as 13.5mpg loaded with all my tools (van weight 9400#) and towing a trailer with AC equipment (trailer weight 6500#) and as high as 19.96 when I drove it home from the dealer empty . I normally get 16.8 to 17.4mpg:) My gasser with a 5.7L doing the same thing was 8 towing and as high as 13.1 with the normal being 11.4-:t

I get about 17-19 depending on how fast I drive on my 200 mile daily commute of which 80% is highway. I usually set cruise on 65 on the way to work and drive like I stole it on the way home (75-85). That's at 9,200 lbs with a Weather Guard Safari Rack with a 4 x 12' x3/16" aluminum diamond plate deck on the top of the rack. I haven't seen 20 since I put my tools and rack on it.

Deleted post. I put it in the wrong section.

18 -19 mpg city hwy mix , 20-22 hwy 9 mph over posted limits . worst 16 mpg w/ cold weather warm-ups . Probably could do better but every light has a rolled full throttle start (can't help myself :D) always carry 1000-1500 lbs of tools , parts , 6 golfcart batterys.

Well, My first tank after the muffler delete was 18mpg and I was a little heavy on the throttle enjoying the new found sound. I would have gotten about 16 the way I was driving it before the delete pipe.:) But I noticed that I get a little more "smoke" when accelerating hard.

I'm still heavy on the throttle enjoying the new sound, but still getting 18 to the gallon which is about 1.5 better than what I was getting. Once the newness wear I wonder? lol:)

Starting to get better mileage. 21-22 last 2 tanks.

Mine has 40,000 miles, all stock, and loaded with equipment. Towed a 22 ft 4200 pound trailer from MI to Va down I-77 cruise set at 68 most of the trip. dropped the trailer and came home with just van and equipment doing 70-75. Got 16mpg for the round trip. This is in my 06 van.

I would say that is good !