Sorry to restart an older topic but I find myself in this exact situation and I'm looking for options that don't break the bank.
My 2016 Sierra already has a 1.5" front lift and 2" rear lift and I'm not looking to lift it any higher and also not interested in larger tires, the 20's are fine. I have read all of the above and thank you for posting all of that info, it's very helpful but also still a very expensive option to go with the Halo Lifts and the Xinerring options.
I spoke to Rancho Tech support yesterday and they told me that if I were to swap from Active to Passive and not splice in resistors that my truck my limit the speed, has anyone else heard or or experienced this? True/False?
As for splicing in resistors, I did this to my wife's 2011 Tahoe LTZ with the Z55, swapped the electronic front and auto-leveling air rears to Passive and spliced in the provided resistors and there have been zero issues. But, the resistors for the Sierra are different than those for the Tahoe, so does anyone have a source, band, URL, info on them?