Hey All,
This is my first post and I'm glad I found this forum. I'm considering a new '24 GM Sierra gasser with the 10 speed Allison transmission. I looked through quite a few pages and couldn't find a thread pertaining to MPG on the new 6.6L with this tranmission configuration. I'm looking to use the truck for a hauling a truck camper and I haven't owned an HD struck before so please pardon my ignorance.
What MPG have you been getting on the freeway and also around town? If you have a truck camper, what have you been getting unladen and laden?
If you came from a previous 6.6l gasser with less gears, how has this been doing in comparison? Was it worth it for the upgrade (as I'm also considering a used truck).
Thanks All,
Matt