[jsb5717]

It's not just the Rockies...it's any grade. The diesel will work less than gas and you will feel the difference. The steeper the grade, the greater the difference. The diesel truck will also have the compression brake which is very nice on downhill grades. The diesel will also get better mileage and will last longer (properly cared for). I've had diesels for over 20 years and I don't think they are higher maintenance.

It's true that the diesel engine will reduce payload and will cost more. But for me the trades offs are a no-brainer.

You will get opinions from both sides of the aisle on a topic like this and will ultimately make your own decision. Both rigs will get you there. Either way...get the 1-ton. They will both pull (tow rating) the same weight but can't carry (payload rating) the same weight.