With the increase in vehicle thefts in my area, I want to do something that would prevent the reprogramming of keys via the OBD port. Since I put my fobs in a signal proof faraday box to prevent using a signal booster/repeater, the only other way to start my 2021 Sierra would be to program a new key fob directly. Saw some ideas for fake/dead ports or a lock box on top of it. I just want something simple. What I was thinking was a double pole/double throw switch hidden somewhere to kill just the data lines to the port. I thought of killing just the power to it but that won't work if their programmer has its own power source. Since it's a newer vehicle, I would have to cut both the high and low speed data lines.
@TJBaker57 , do you think this would work? When the switch is flipped back on, will data work properly? My gut says it would unless I need some special switch or something.
@TJBaker57 , do you think this would work? When the switch is flipped back on, will data work properly? My gut says it would unless I need some special switch or something.