Suburban runs like it should.
I purchased this more to disable the fuel management program and recalibrate speedo for larger tires, but decided to do the full tune. I am very pleased with the outcome! The truck doesn't lunge while downshifting (because of AFM), it shifts smooth and confidently, performance is improved, gas mileage stayed about the same as w/ AFM, and it doesn't require 93 octane. Even w/ an exhaust system and cold air intake, the tune went smoothly and never any check engine lights. Very Happy!
flash pay for a 2004 z71 suburban
For appearance: The unit is build and look cheap! The bottoms get stuck! Like a kid toy! It should look better for over a $300 unit! Using: it's easy to plug in and save the original settings but, when going in to change setting for towing or anything else and unless you know what to do, there is no way you can do it your self without experience and knowledge of what it's asking you ( stock or ..?). This unit needs to have a better reading material or something on the Web site! I need help!!!!