Im about 6mo into my yukon and iv'e done a tune and an intake. exhaust is comin soon. not many low cost boltons are going to make a big difference on a 5000 + lb truck.
Since youve done engins swaps before you could sell the 5.3L and get a 6.0L? just a thought, but a little overkill.
I've thought about it. I had a denali before and feel a difference but my truck has only 50k on the motor so don't think I wanna pit something with more miles. I think im just doing intake, tune, electric fans, and servo