Look at the new OTC scan tools,say OTC Bosch on them.SPX no longer owns OTC,Bosch bought out OTC from them.It includes Robinair and their other brands SPX owned Bosch bought out.There is stuff the aftermarket scan tools can't get into,GM security systems are one.Went through this with a 2006 Chevy Cobalt using the Modis,tried reading the codes and could not.The Factory scan tool,Tech 2 was the only scan tool that read the codes.I see OTC going under now,anything Bosch buys out gets screwed up.Buy any Bosch diagnostic equipment,it is yours with zero tech support.Can't keep reps either too,both reps in the Michigan area quit last month.