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jffnkrn's avatar
jffnkrn
Explorer
Jun 19, 2022

GM 6.6 & 3:73

Looking for actual input, experience not opinions without experience.
Anyone that has a GM, 6.6 gas with 373 gears, towing I would like to know your experience with towing power, fuel mileage and overall performance.
Again, looking for actual information and maybe a comparison to what you had before. thanks in advance. Jeff
  • Grit_dog's avatar
    Grit_dog
    Navigator
    Jul 03, 2022
    Well, it will do slightly better than a 6.0 3.73 6speed truck.
    But will not be an earth shattering improvement.
  • mkirsch's avatar
    mkirsch
    Nomad II
    Jul 05, 2022
    Dadoffourgirls wrote:
    I had a 2020 6.6 gas reg cab dually. I towed 15k lbs (gooseneck with round hay bales) many times. It was in Michigan. No issues, and had experienced some uphills from a stop.


    Yeah, from the field to the farm, a few miles at most. You can put up with it being slow and anemic. You might even think it's fast and powerful.

    I fell into that with my enclosed trailer and 2003 Silverado 1500 4.8L. Towed it great around town. Acceptable for 50-mile trips. After the first 200+ mile trip, I knew I didn't want to do that forever.

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