I pulled my 22 ft trailer with two Rubicons on the deck with a 9" extension for three years without a problem. Truck was a 2003 K2500 8600 GVW. Firestone air bags kept the rear end up and it pulled like a dream. Don't know what your issue could be.
I'm using the same setup now on my new 2011...
Reviving this old thread.....
Well, I still have this truck. Have new exhaust with hi-flow cats and a Magnaflow dual in and dual out muffler with 2-1/2" tail pipes..it sounds good.
Also have a Cortex tuner and throttle body spacer. Also and Air-Raid cold air intake. I tune it for towing and run...
Is that normal mileage for these trucks?
I've noticed strange differences in mileage over the years between trucks...in 1998 I bought a new Z71 ext cab long box with 5.7 litre automatic...one of my brother's bought the same truck in a 2WD short box...mine would get 22 on the highway...he could...
I have an STF deck on my '03 GMC 2500 4x4 short box, with two Rubicons on it. I had to make an extended hitch to move the ball back about 9"......after I poked two holes in my trailer......:(
That is incredible mileage for any truck...but a 3/4 ton 6.0L....that's amazing:eek:
I've had my '03 2500 6L for three years and I've never ever checked the mileage.I figure it doesn't matter because I'm going camping regardless if it's 4mpg or 14.....:d
speaking of mileage with a 6L...
I have an '03 GMC 2500 4X4 EC short box with 6L motor, 8600 GVW truck, 166,000KM on it. Mechanically very sound and it runs great.
I haul two Rubicons on an STF deck and pull a 22 foot bumper hitch travel trailer, quite a load for the truck.
Truck is 100% stock.
Been thinking of a chip, or a...