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73guna's avatar
73guna
Explorer
May 05, 2016

*UPDATE*Calling Duramax owners 1st trip with camper bad fuel mileage

I have a 2007 crew cab Duramax LBZ 4 wheel drive. We recently got back from our first camping trip with our new Wildwood 31qbts. The trailer weighs in dry at approximately 8500 pounds. Loaded down I ...
Tow Vehicles
IdaD's avatar
IdaD
Explorer
May 05, 2016
carpetguy2 wrote:
I had 07 cc lb lifted with 35s towing a 34 ft tt and a 40 ft 5ver.Never got that crappy mileage.I towed 65-75. I was getting 12 to 15 mpg
I did remove my cat first and helped alot.
Never threw a code.Then I went with 5 inch exhaust and did a egr black plate and did get efi.It made a big difference.
Then my mpg jumped up about 2 mpg and alot lower egts.
Now I have a lmm dually same set up and still get 15 to 17 mpg towing my 40 ft 5ver


Do you only tow downhill when there's a tailwind?

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