Kaisen
Explorer
I like the durability of 3/4 tons. I like that era Chevy 2500’s. Do all 2500HD’s have 6L90e and full-floating axles? And the locker? How can I tell?
Yes, all 2007-2014 GM 2500HDs have the 6L90e 6 speed automatic, and have AAM 14 bolt full-floating rear axles. 10.5" in the gasser, 11.5" in the diesel.
The RPO codes on the SPID label in the glovebox tell you which ratio (GT4 = 3.73, GT5 = 4.10) and G80 equals mechanical locker
That all said, I don’t know if what I need or want merits a 3/4 ton. I think it’s overkill. Good 1/2 ton should do the job while keeping the ride comfortable for everyday driving and light load campouts. While keeping the (highway) MPG tolerable. Stock, I’d think the F150 with any engine, or the Silverado 5.3 should get close to 20, if not more. My father has a Tahoe with the 5.3 and it gets 22 highway. Not bad.
But again, not quite getting why I’d need a 3/4 ton. Maybe I’m missing something.
I’ve actually even thought a 3.5/3.7 N/A V6 in the Ford (or 4.6 in the GM—are those any good?) wouldn’t be too bad either.
You buy a **GM** 3/4 ton because:
Wheel bearings are stronger
Brakes are larger
Stock E load range tires and shock/spring tuning for same
HIGHER PAYLOAD RATING -- better control carrying your overlanding gear
Stronger transmission, transfer case, u-joints, shafts, etc
Full-floating rear axle is better than semi-float, especially if you've ever had one break on the trail
14 bolt G80 locker is bulletproof, the 1/2 ton G80 locker is called "gov bomb" for a reason
ENGINES DO NOT HAVE PROBLEMATIC DoD/AFM - -the GM Gen IV 6.0L is bulletproof, and powerful
Better axle gearing, typically 3.73 or 4.10 versus 3.23 or 3.42... helps with intended taller tires
Fuel mileage is similar if you're laden. By the time you run 33"-35" tires, lift to clear them, regear for them, and add the stuff you want to carry... the delta between a 1/2 ton 5.3L pickup and a 3/4 ton 6.0L pickup might disappear completely. In fact, in my experience the larger 6.0L can get better fuel economy at the ~7,000-9,000 total weight range. Ride at that point will also be better, as the 1/2 ton will be at the bumpstops and generally not well controlled.
Just my opinion, having owned about a dozen of these things