Axxess - XSVI-9003-NAV
Non - amplified, non - onstar interface harness that retains accessory power and provides navigation output wires.
The XSVI series interface is an inexpensive solution that provides +12-volt accessory power output for select vehicles that data control signals instead of conventional power signals. If the vehicle is equipped with retained accessory power features, the XSVI will keep those features. Also provides outputs for VSS, Reverse, and Parking Brake.
35$! Originally paid 50$ from bestbuy
contact: 818 653 4952.