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CURT Custom Wiring Harness #56077

Class: Wiring UPC: 612314560776

Where To Buy

MSRP $19.72

  • Plugs into vehicle tail light assembly to provide a 4-way flat socket
  • Simple plug-and-play design eliminates the need for cutting or splicing
  • 4-way flat output connects tail lights, brake lights and turn signals
  • Dust cover included to keep connector clean when not in use
  • Backed by a limited one-year warranty
  • Made in USA
Instruction Sheet Download pdf
Part Type Custom Wiring Harness
Shipping Weight 0.445
T-Connector Location S3
Warranty One Year Limited
Electrical System Type 2W
Output Type 4-Way Flat
UPC 612314560776

Additional Information

A CURT custom wiring harness (also called a T-connector) is a simple, plug-and-play electrical device that eliminates the need for cutting, splicing and soldering when installing vehicle-to-trailer wiring.

Most vehicles do not come ready to tow. Unless your vehicle has a towing package, it is probably not equipped with a trailer wiring connector. This is where CURT''s custom wiring harnesses come into play. Custom wiring harnesses plug into your vehicle''s electrical system using original equipment (OEM) connectors. Our custom wiring harnesses use two or more OEM connectors to plug in at the taillight assembly and provide a standard trailer socket to allow a trailer to be plugged into your vehicle''s power system.

This harness provides a 4-way flat connector socket and is designed to be a custom wiring harness for certain years of the Pontiac Montana SV6, Saturn Relay, Buick Terraza or Chevrolet Uplander (to verify your vehicle compatibility, see the CURT application guide at CURT custom wiring harnesses are long-lasting and quick to install. They come with dust covers to keep your connector clean when not in use and feature a one-year limited warranty to give you peace of mind.


Year Make Model Style Install Time Other Hitches
2007 Chevrolet Uplander All
2008 Chevrolet Uplander All
2005 Buick Terraza All
2006 Chevrolet Uplander All
2006 Pontiac Montana SV6
2007 Buick Terraza All
2007 Saturn Relay All
2006 Buick Terraza All
2006 Saturn Relay All
2005 Chevrolet Uplander All
2005 Saturn Relay All
2006 Pontiac Montana SV6, With 121 In. Wheelbase Only
Page 1 of 2 12 Total Vehicles


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You do not remove the rear drivers side light to hook this up. You remove the panel by the side of the light and pull out the wires. You will see a connector that fits over this part. Simple as one two three. Thanks John at Tech Support at CURT for helping me. I figured it was the wrong part because I was told by others to hook up to my tail light but this is not correct. The connector is inside the panel. The dealer did not tell me this they wanted me to buy another system that cost 3 times as much. Again thanks John from CURT. This item cost $20.00 Canadian at AutoMachinery in Fredericton lot cheaper than the dealer wanting $60.00 for a connector that had to go to both rear lights AND do the same job as this item.