newb looking to set up 2010 Chevy Express 3500

@fourgirls, thanks for the heads up on the bluetooth. I've had the device for several years now on any of five vehicles or so, but I've never used it as more than a passing analysis for some driveability problem or code check. I know it gives you the ability to start writing values and really jack something up (with the custom PIDs), but never considered that it's "passive" use could cause an issue.