Review on IDataLink Maestro HRN RR GM5 GM5 T Harness by Scott Richardson

If you want to use the Maestro ADS-MRR, that's pretty much a requirement for connecting to a GM truck. The best news is that you get a schematic with the ADS-MRR on the website. So all you have to do is paint the ends of the wires, install the butt connectors, and crimp. Thanks to this cable set I had an easy installation. Also the coolest part is the OBD-II port which allows my radio to show me all the internal information like engine temp through exhaust gas sensor, MAF throttle position etc.