Regular Tune Caused Diagnostic Errors
Reviewed By Vincent C (Waukegan, IL) Reviewed for a 2007 GMC Yukon —3/10/2011 5:05 AM
The unit was easy to install. The Regular tune download worked for about 100 miles and then caused a pollution control error which would not allow the transmission to shift out of low. I was able to download the OEM tune which corrected the problem but lost any potential fuel savings of the tuner. I have not yet tried the performance tune or higher octane fuel yet. The driving coach did help me save about 1 MPG without the tuning.