Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
11-12 with 4.10 gears / dont think you could get 3.73 with a hd 2500
maybe with the standard 3/4
My old man has a '00 2500 Ext. Cab 4x4 short box with a 6.0L. I have an '01 2500HD crew cab 4X4 s/box with the 8.1L and Allison tranny. My 8.1 gets almost identical mileage as the 6.0L whether loaded or empty and my 8.1 will do circles around it. I don't think you could give me a 6.0L (well, okay, I'd take it). The 8.1's are a bit tougher to find, but I'd hold out for one if you want to stick to gas.
I got a friends that has a 6.0L 400/400 in his GTO 6 speed get 26-28 highway and 20 in town
I have had 2 trucks with this motor and would not recommend it.
2002 GMC lifted w/35's 3.73 gears
8-10mpg driving around
6-8mpg pulling enclosed 27ft.
2006 Chevrolet stock 4.10 gears
10-12mpg driving around
8-10mpg pulling trailer
My old man has a '00 2500 Ext. Cab 4x4 short box with a 6.0L. I have an '01 2500HD crew cab 4X4 s/box with the 8.1L and Allison tranny. My 8.1 gets almost identical mileage as the 6.0L whether loaded or empty and my 8.1 will do circles around it. I don't think you could give me a 6.0L (well, okay, I'd take it). The 8.1's are a bit tougher to find, but I'd hold out for one if you want to stick to gas.
That's real nice to know, but how does he haul sleds with it?
he has a hide away hitch for it i would imgine it would haul sleds at a nice speed, and with 6 manual gears decent mpg much better than 4 auto.
not the exact same motor in the GTO and the Truck some differences in there.
We came across a 2500 avalanche with an 8.1, but haven't seen any 2500 quad cabs with the 8.1, just the 6.0. but thats good to know thank you. I may start looking at the 8.1 if the fuel aconomy is going to be similar.