chevy duramax disel
would to hear from owners of these as far towing and mileage thanks in advance for your replies
Forum Discussion
2008 GMC Sierra 2500 Duramax. 8-10 mpg towing a 23' toy hauler (about 7200 lbs loaded). 12-13 mpg? Must be the newer trucks because I have never gotten near that while towing.
