Tow Command add-on?
Along with the brake controller and wiring harness(es), you will also get a new brake master cylinder. Not exactly a huge item to swap out, but definitely more than doing the plug & play with a couple wiring harnesses. And, it is my understanding that once the kit is installed, you will need to get the truck into a dealership to have the PCM and/or ABS computers reprogrammed in order to incorporate the trailer brake control functionality in with the vehicle's brake functionality.
There is now a kit available to install TowCommand trailer braking system on trucks that were not originally equiped at the factory. For diesel and all dual rear wheel applications use kit 5C3Z-19H332-BA. For gasoline trucks with single rear wheels use kit 5C3Z-19H332-AA. Broadcast Message 4065, 4643, 4937.
If a TowCommand brake controller is dealer installed on an 05 truck, it may not work correctly unless a master cylinder with a brake pressure transducer is installed, and the instrument cluster reconfigured to recognize the TowCommand. Broadcast Message 4642, 4928.



