Is OBDwiz free?
OBDwiz is included free when you purchase a qualifying OBD2 scan tool such as OBDLink MX+, OBDLink SX, OBDLink LX, OBDLink EX, OBDLink MX Wi-Fi, and OBDLink MX. If you already have an OBD2 scan tool, then take a look at TouchScan.
Which is the factory scan tool for the latest GM vehicles?
GM Tech 2
GM Tech 2: This is the GM factory scan tool used in all GM dealers since 1996. Model coverage includes all makes and models of GM vehicles including passenger cars, trucks and vans.