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The GM Tech 2 is a scanner that is used to diagnose technical problems with certain GM vehicles ranging from 1992 to 2010. Although using the scanner itself is a complicated process that should be done only by professionals or car enthusiasts with a working knowledge of the scanner, clearing the history data values for testing is a simple procedure.
Instructions
1.Turn on your scanner and select the "Body" option.
2.Select "Park Assist Module," then "Special Functions."
3.Select "Clear History Data."