Thank you all so very much for your input. I read all the responses at least 3-4 times (except the ones that felt like mom and dad fighting). I was convinced from this thread that the 6L gas would be a completely adequate truck and beyond reliable, bullet proof. In the end I could argue I was gun shy about buying too small a truck again but could be I just wanted it. I ended up with a Duramax, I got a killer deal on a used one and paid about what I was looking at spending on the 6L. Time will tell if I made the right choice but I’m real happy right now. Can’t wait to tow the TT over a mountain!!!
Lots of good feedback thank you! @ewbldavis I have put cold air intake, cat-back exhaust, Black Bear performance Tuner on the 5.3L. All have helped but still feels like it lags going over the mountains. Maybe I don't push it enough and it has more power. We went on a 2 week trip last summer to Grand Teton and Yellowstone, by the time we were driving over the Sierra Nevadas out of Reno coming home I was just tired of dragging up the mountains with bigger trucks pulling trailers flying by me. I dont even want to talk about the grade leaving Idaho going to Jackson Hole, foot was all the way to the floor and if it was another 1/10th of a mile up that hill I don't think I would have made it. I also put air bags on which helped with ride quality pulling the TT. And I do have a really nice WD hitch set up @grumpy bear I would like to easily do 55 mph
I am sure this is a common topic on here but I am really hoping to get some solid advice specific to my situation. I am looking to replace my 1500 with the 5.3L, I have modified it as much as I can and it just doesn't have enough power to tow my travel trailer. I have a 28' trailer with dry weight of 5340 and GVWR of 7000. We love going to the mountains and that is where it lacks adequate power. I know the diesel is superior but looking online at hundreds of listings for a used one it is also $10,000 more. If the 2500HD with the 6L gas would be adequate for my situation that is a lot of money to save. I don't need to go 80 mph up the mountain with my trailer but I would like to be able to keep a reasonable safe speed. From all I have heard to 6L is a great, reliable engine but I need to be sure it is adequate. Thank you 🙏
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