Trailer Hitch Receiver, 7-Way Wiring and Brake Controller Recommendations For a 2017 Buick Enclave  

Question:

Expert Reply:

Yes, you are able to install a trailer brake controller on your 2017 Buick Enclave that did not come with the factory tow package. First you will need a Receiver # e98863 to add to your Enclave. Next we have the 7-Way # 118271 which will allow you to plug into the factory harness and includes the fuses and relays you need to activate the harness. This will attach to the receiver using the Mounting Brackets # C57202 and # 18138 so you will not have to drill into your vehicle fascia.

I recommend the Redarc Tow-Pro Liberty Brake Controller # RED24FR with its small control knob it give you a clean factory appearance. This is a proportional controller which adjusts braking automatically for light and heavy braking. It will connect to the factory harness with the Plug-and Play Wiring # RED27FR.

expert reply by: Bud M

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Vinny D.

4/13/2026

I am having trouble finding a 7 pole wire harness for my 2017 Buick Enclave . When I plug in the part number I can’t locate it in the site . Any ideas?

Andrew N.

4/13/2026

@VinnyD Hey there, does your Enclave already have a 4 way, or the factory wiring for a trailer connector? And what is the part number you are trying to find?

Vinny D.

4/13/2026

This vehicle did not have a trailer hitch. I purchased one from Curt . I thought it had all of the plug and play accessories . The electric brake controller plugs in under the dash and the trailer hitch mounts perfectly to the vehicle . I just have to find a way to get the brake lights and the electric brake to work It has a 7 pole plug in the trailer hook up

Andrew N.

4/13/2026

@VinnyD So it already has a 7 way plug on the back? It's just missing the harness? I'm a little confused as to what you're needing. Or were you saying the trailer has a 7 way connector, and you need to add one to your vehicle? If you have the tow harness and need a 7 way, Draw-Tite has part number 118271 on their site but we don't carry it at this time. Otherwise, we have custom 4 way that plugs into your factory harness # C56245 which can then be converted to a 7 way for trailer brakes with # ETBC7.