Active fuel management Range
Installed on 2010 5.7l Suburban, Engine was re-piston and ringed by GM. Abnormal oil consumption was the issue. Dealer service recommended this device and changing oil every 3K. I am now seeing no oil loss at 3K. As indicated on Dash engine stays in v-8 mode as it should with this device. Shipping was quick. Very Satisfied****
HyperTech 2012 Suburban 4x4
With the installation of the HyperTech Max Energy Programmer within the last couple of weeks.I can definitely feel the power increase when I step on the gas. I have not yet taken my vehicle on any long trips to see if I get better gas mileage as proposed increase. Install was easy and took 15 minutes. I wish there was refence sheet to upgrade my shift points and rev limiter for even more power gains.
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!