Hello All!
My 2019 Tahoe LT (5.3L) is only getting 9-10 mpg while towing a 5,000 boat on the freeway at 65-75 mph. On my 2015 Tahoe I was able to get 14-15 mpg towing the same boat. Even back to my 2010, the mileage was never this bad.
Tow switch is engaged. The 'hoe has 75,000 miles on...