David Van Houzen

That’s right, it was torque converter (we were having a beer on their boat) I forgot! Anyway thanks to both of you, I’m heading out next week and I’ll try some of your suggestions.

My friend, who is a retired GM engine guru, says my tow mode is probably blocking my turbo from locking? He suggested to try staying out of tow mode and see if that improves my mpg.

I’m sure my loaded weight is higher. The 3700 lbs is dry weight of trailer but I would say loaded it’s about 4500 lbs. The travel trailer has a front end that’s about 10’ high x 8’ wide. It is curved at the top for aerodynamics. Ps, thanks for your response.