Hypertech Max Energy GM 99-2007 gas.

[leavy30]

I sold my Silverado a while back so this is up for grabs. This tuner will add 11 HP-10 ft-lb of torque on regular has, and 18 HP-16 ft-lb of torque on premium gas. You can also make a lot of adjustments such as, shift firmness, rev limiter, top speed, and many others. Will also adjust speedometer for bigger tires, and read and clear DTC codes. Very easy to use, just plug it into the OBDII port and follow the prompts. This should program any Silverado/Sierra with a gas motor 1999-2007. Comes with the box and everything it came with new. I set my truck back to factory before I sold it so this is all ready to go. Should also work on Tahoes and Yukons. Asking $225 shipped.