2020 GMC/Chevrolet Diesel Engine
“The optional engine remains the largely carryover 6.6-liter Duramax V-8 turbo-diesel—445 horses and 910 lb-ft—but is now mated to a 10-speed version of the excellent Allison automatic gearbox, up fro...
Forum Discussion
Huntindog wrote:
OTOH, it doesn't surprise me, as I bet the majority of 1/2 ton trucks never tow anything or go offroad. Low range for those trucks would be an needless expense.
When we bought our 2012 Yukon XL I searched hard to find one with the optional tow package because it added two things to the truck...the 3.42 axle and two speed transfer case. While we owned that truck I only used 4 low one or twice at the most. The number of times I needed it was none.
Last summer when we replaced that truck with the 2017 Suburban I was fine going with the standard one speed transfer case with the auto mode considering how little I used 4 low in the previous truck. I also decided we would never tow anything that required the 3.42, so there was little reason to not go with the 3.08.
Maybe it’s just now making its way to pickups, but on the SUV’s GM has been doing this since at least 2010.
