Recommended Trailer Wiring Harness for a 2004 GMC Sierra to Convert Separate to Combined Wiring

Updated 02/24/2023 | Published 02/23/2023

Products Featured in This Question

Curt Powered Tail Light Converter w/ 4-Way Flat Trailer Connector and Install Kit

(53)

$87.95

Curt Towing Starter Kit for 2" Hitches - 2" Ball - 2" Rise, 4" Drop - 7.5K

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$70.87

etrailer Trailer Hitch Receiver - Custom Fit - Matte Black Finish - Class III - 2"

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$199.24

Question:

-I have 2004 GMC the truck 2 separate circuit for the turn signals and brakelights , but trailer only has 1 light per side. Im sure theres a adpator kit so I can get brake lights to work. Normally the brake cancels out the turn signal.

asked by: .Ron K

Expert Reply:

It sounds like you need to install a trailer connector on your 2004 GMC Sierra and if that's the case we have some great options for you. The Curt Powered Tail Light Converter Kit with 4-Pole Flat Trailer Connector part # C56190KIT is what I recommend. This harness will take the separate wiring on the truck and convert it to combined so you can tow a trailer. In addition to this, you'll also need a trailer hitch like the etrailer Trailer Hitch Receiver part # e98849 and a ball mount/hitch ball like the Curt Towing Starter Kit part # C45554.

expert reply by: Conner L