9 miles per gallon!!

[h2100]

Since you get decent fuel economy when you are not a towing. I was suspect the trailer is the culprit. Does the trailer have surge brakes if so are the adjusted properly?

i'll check this. i can push it around the yard with help from the wife (with no boat/she's not that strong!)

 

[Bigkevschopshop]

Get your RPO codes from your glovebox and post the photo here, it really sounds like you have a 3.08 rear gear, if so that could be part of the issue. Do you use tow haul button and lock it in 4th or 5th gear on the trans?

 

[tom3]

When you're towing do you see the AFM dropping cylinders on easy cruise? Not sure how this works in tow mode.