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  1. S

    Make a switch from a 5.3 to an 8.1?

    I think I'll just look for a couple year newer Denali and be done with it. The 6.0 should be enough if I have a couple mods done to it. We tow a fairly often, but the thought of a 2500 as a daily driver for my wife doesn't make her happy.
  2. S

    Make a switch from a 5.3 to an 8.1?

    Could be................I don't have a better theory. I was reading in another thread about someone swapping a 6.0 liter into a 5.3 vehicle. Is this a reasonable swap, or some frankenstein stuff?
  3. S

    Make a switch from a 5.3 to an 8.1?

    I wonder why? Did it pick up any torque?
  4. S

    Make a switch from a 5.3 to an 8.1?

    Yeah, the VortecMAX looks like a nice package, but I'm not in the market for a new pick up. I wonder how many hop up items are available for the 8.1? I'd imagine there's lots of power hiding in all that displacement. Our other option could be a Denali XL 6.0, but they don't have a much bigger...
  5. S

    Make a switch from a 5.3 to an 8.1?

    yep, diesels are great for towing, no question there. I've owned two Duramax pick ups over the years. Just sold my last one about 6 months ago. The 2002 was awesome. Great mileage at 20+ unloaded and it towed well. The 2005 was also a nice truck, but it got terrible fuel mileage for a diesel @...
  6. S

    Make a switch from a 5.3 to an 8.1?

    I currently own a 2003 Yukon XL 1500 with 60K miles. It's been a great vehicle. I am looking at a 2003 2500 XL with an 8.1, to get better towing performance. We tow a 20' enclosed trailer around 5000+ pounds. Any input on the 2500 series? MPG, reliability, etc? Thanks in advance.
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