I have a 2018 Limited 4x4 with 6'+ bed and I pull a 7500# travel trailer with no problem at all. I can run 70 mph for hours; plus I've never had a problem with oil overheating. I would not hesitate to go up to 8000 based on my experience, but I'm also running both an engine and trans tune and...
Correct it was installed during the test. And yes, got the tune before proof of registration was required. I just purchased the Sofa King trans tune for that reason but have not had a chance to install it yet. There is some negative talk about Sofa King on another forum but it seemed to be from...
I have the GDE tune here in California and recently had to have an emissions (smog) test. It passed. Funny thing was the tech warning me while he was running the test not to get a tune because then in the future it wouldn't pass.