Duramax, Allison, Tow-Haul mode advice
We traded the '05 Tahoe in on a new 2013 GMC Sierra 2500HD crew cab with the Durmax diesel, Allison transmission, and HD tow package. We tow a Surveyor Sport 220 that weighs in about 4,400# dry with a...
Forum Discussion
nevadanick wrote:
I pull quite a bit more than that and only use tow haul when i get in mountains.
x2. And even then I find it annoying in the mountains sometimes. I will tap the brakes and it will down shift and then I add fuel and it will upshift and then I will tap my brakes and it will downshift............I also get slightly better fuel mileage with it off.
