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Recommended Brake Controller & 7-Way Plug For 2017 GMC Savana 4500 Cutaway


I have a 2017 GMC Savana 4500 Cutaway with the tow button. What do I need to install brake controller and 7 way plug for this?


Expert Reply:

If your 2017 GMC Savana 4500 Cutaway came with the factory tow package then # HM40975 would plug into a factory harness already present under the van. It is usually tucked up above the spare tire or in that general area.

For a brake controller I recommend the Prodigy P3, part # 90195. It's the easiest to use and most reliable controller we carry and one of the best on the market. The LCD takes the guess work out of using it and troubleshooting any errors that may come up along the way.

If you look under the dash of your 2017 GMC 4500 Cutaway there should be a wire bundle with white tape. You can probably find it to the left of the steering column. It may or may not be identified with a white label.

In order to connect your brake controller # 90195 to your 2017 Cutaway, you will need to hardwire the controller to install it. The color wires on the brake controller tell the function.

BLACK wire brings +12V operating power to the controller from the vehicle battery; WHITE wire grounds to the battery; the BLUE wire carries the controller output to the 7-way trailer socket; and the RED wire accepts the triggering brake light switch signal that tells the controller to generate output power for the trailer brakes.

You can use a circuit tester like part # 3808 to test the wires on your van for function. The main function to check is the stop light switch wire. That is done by finding the cold of the stop light switch. It is only activated when the brake pedal is pressed.

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