just bought a topdon rlink x3 and just learn that i need to buy a subscription ( i know i should read more before buying ) i just bought a tahoe 2007 and have multiple light in dash , so i just order a obd link mx+ and since i need to present myself , i was a GM diagnostic tech for 15 years untill 2001 and after i worked for mercedes for 17 years so if someone has a question or some info they like to share feel free