If you have a 2016 truck, and able to get the factory harness, you can just wire in your resistor (if you are wiring saavy). I opted to get the harness from Gen5DIY so I didn't have to wire in the resistor. If you have a 14/15, you get the connectors, figure out the repin, wire in the resistor. Or just buy what you need from Gen5DIY .
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