calsdad wrote:
The reason why I'm asking this is that I just picked up a 2010 GMC Yukon XL 2500. Which is basically a 2500HD with an SUV body. It has the same 6.0L engine and the 6L90 transmission as the 2500HD pickup. I believe the rear axle is the same also.
Congrats! The 3/4 ton GMT900 SUVs are great!
The 3/4 ton SUVs are not basically the 2500HD with SUV body. The frame is a lot stronger on the pickups. The wheelbase is 14" longer for extended cab/short bed or 23" longer for crew can short bed. The axles are rated higher as well as the wheels.
Now the GMT800 SUVs had tow ratings as high as 12000 pounds with GCWR of 18k pounds I believe. That used the same/similar axles and wheels as the GMT900 SUVs. With the 6-spd, I don't think you'll notice much performance difference between 3.73 and 4.10. You'll be stuck in 4th gear most of the time anyway at 8000+ pounds anyway. If you want to make driver noticeable changes, get 4.56 gears, a Black Bear Tune, OEM-clone towing mirrors, and that receiver. I think you'll want a premium WDH (Hensley/Propride) along with the custom receiver. Someone posted a great thread on adding a second receiver to his GMT900 Suburban/Yukon XL. I'll try to find that.
Here you go.
