I trailered the SD up there with my '95 Suburban (I just replaced the original 6.5 diesel engine with a brand new AM/Gen 6.5 diesel from the HUMVEE engine plant in Ohio). Boy, what difference in towing! With the aftermarket tune in the truck and all the exhaust mods I have made over the years, it makes around 500 lbs of torque and an extra 75 horsepower now. It even got 12 mpg towing 450 miles. (the old towing mileage was 10, if I was going downhill).
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