Great OBD II Scan Tool
It's nice to use a tool that I have total confidence in, and Bosch provides just that. This works on my 2006 GMC Sierra 1500HD (over 8500 GVW), as well as my Buick Lacrosse, 2012. It allows real time graphing of any two performance items by selecting them for an X Y axis. For example, the mass airflow sensor can be plotted against the throttle position sensor, or engine RPM, or engine temperature, etc.
Verified purchase: YesCondition: Pre-owned