EFILive AutoCal V3

2016 LML Duramax with trans tune and light tow tune. So far so good. No issues at all. Doesn’t smoke at all which I love.

This product is awesome. Arrived in 3 days, high quality connections, super easy to install with really easy to follow directions, truck has tons of power and sounds sweet. nothing sketchy or bad sounding as in over fueling cylinders or way to high of revving. If you have bigger then stock tires I would highly recommend trans tuning because tune 4 and 5 is rowdy on stock truck. Will definitely be buying again. Using it on my off-road only truck 😏😏

These guys are sharp and willing to go out of their way to make sure all your questions get answered and you are completely satisfied. Wouldn’t hesitate one bit using them for your tunes. Thanks tune supply

They sent me some steps to follow and update my BBX box and now everything works great, awesome customer service they helped me out with everything.

Works as advertised with some customer service class.