Hummer H1 Performance Chips
Posted by Ernest T.
"I have owned the Cortex and this does the exact same thing. This one can only be used on one vehicle, that is the only difference. Woke my Denali right up, it has never run so good."
Posted by Josh K.
"Installed in my 2011 Sierra with the custom dash mount, took about 20 min to get everything in and working. Very easy to install and looks great! Several custom tunes to choose from on the device, or go to Edge website and download others."
Posted by Kurtis K.
"First got the Diablo in Tune... it updated very slowly... I mean slow! Then plugged it into the truck and couldn't read my PCM... But I got it working and...very impressed! The Hemi is a mean machine! "
Posted by Randy F.
"It got to my house quick; was easy to install, and allows for speedometer adjustment for tires! I had to read my speedo 10 miles faster than what it said before! Not anymore!"
Posted by Jonathan P.
"The tuner wad easy to install but didn't make that big of a difference, a little horse power but nothing for fuel mileage so far."