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2002 - 2006 Chevrolet Avalanche 1500
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2004 - 2012, 2015 - 2026 Chevrolet Colorado
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2009, 2017 - 2026 Chevrolet Express 3500
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1999 - 2026 Chevrolet Silverado 1500
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1999 - 2004 Chevrolet Silverado 2500
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2001 - 2026 Chevrolet Silverado 2500 HD
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2007 Chevrolet Silverado 2500 HD Classic
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2000 - 2014 Chevrolet Suburban 1500
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Includes extension harness only
Includes extension harness only
Warranty: One-Year Limited Warranty
Finish: Blank
Installation Time Exact (Minutes): 0
This CURT USCAR extension harness is designed to help ease the installation process of the CURT Echo in-line brake controller, providing 24" of extra length for more flexible positioning of the brake control module. It connects USCAR to USCAR and comes with a slit loom sleeve to protect the wires.
CURT offers a variety of high-quality trailer hitches and accessories for select vehicle models. Find the perfect fit for your towing needs at TowUniverse.
CURT, a Lippert brand, offers a complete line of towing products and is the leading manufacturer of custom-fit trailer hitches. We offer the broadest selection of custom-fit hitches, and each one is designed, welded, and coated in Wisconsin.
CURT is also a leader in flat towing products, as well as 5th wheel, gooseneck, and weight distribution hitches, ball mounts, electrical components, cargo solutions, and other towing accessories.
For everything from passenger cars and vans to full-size pickups and SUVs, CURT is 'The First Name in Towing Products®.'
Experts available to answer your questions
Call 888-634-9494Rediscover "Us" Time | Tested. Proven. Safe. Towing Products
164 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 2017 - 2022 | Audi Q7 | For use on vehicles equipped with OEM mating plug |
| 2008 - 2026 | Buick Enclave | For use on vehicles equipped with OEM mating plug |
| 2004 - 2007 | Buick Rainier | For use on vehicles equipped with OEM mating plug |
| 2002 - 2026 | Cadillac Escalade | For use on vehicles equipped with OEM mating plug |
| 2003 - 2026 | Cadillac Escalade ESV | For use on vehicles equipped with OEM mating plug |
| 2002 - 2013 | Cadillac Escalade EXT | For use on vehicles equipped with OEM mating plug |
| 2017 - 2026 | Cadillac XT5 | For use on vehicles equipped with OEM mating plug |
| 2020 - 2025 | Cadillac XT6 | For use on vehicles equipped with OEM mating plug |
| 2007 - 2013 | Chevrolet Avalanche | For use on vehicles equipped with OEM mating plug |
| 2002 - 2006 | Chevrolet Avalanche 1500 | For use on vehicles equipped with OEM mating plug |
| 2002 - 2006 | Chevrolet Avalanche 2500 | For use on vehicles equipped with OEM mating plug |
| 2019 - 2026 | Chevrolet Blazer | For use on vehicles equipped with OEM mating plug |
| 2004 - 2012, 2015 - 2026 | Chevrolet Colorado | For use on vehicles equipped with OEM mating plug |
| 2018 - 2022 | Chevrolet Equinox | For use on vehicles equipped with OEM mating plug |
| 2009 | Chevrolet Express 1500 | For use on vehicles equipped with OEM mating plug |
| 2009 - 2026 | Chevrolet Express 2500 | For use on vehicles equipped with OEM mating plug |
| 2009, 2017 - 2026 | Chevrolet Express 3500 | For use on vehicles equipped with OEM mating plug |
| 2009 | Chevrolet Express 4500 | For use on vehicles equipped with OEM mating plug |
| 1999 - 2026 | Chevrolet Silverado 1500 | For use on vehicles equipped with OEM mating plug |
| 2007 | Chevrolet Silverado 1500 Classic | For use on vehicles equipped with OEM mating plug |
| 2001 - 2003, 2005 - 2006 | Chevrolet Silverado 1500 HD | For use on vehicles equipped with OEM mating plug |
| 2007 | Chevrolet Silverado 1500 HD Classic | For use on vehicles equipped with OEM mating plug |
| 2019 | Chevrolet Silverado 1500 LD | For use on vehicles equipped with OEM mating plug |
| 2022 | Chevrolet Silverado 1500 LTD | For use on vehicles equipped with OEM mating plug |
| 1999 - 2004 | Chevrolet Silverado 2500 | For use on vehicles equipped with OEM mating plug |
The CURT 24" USCAR Wiring Extension Harness (Part #56475) fits 2017-2022 Audi Q7 models, so your 2026 Q7 would not be compatible. This extension harness is specifically designed to add 24" of extra length for easier installation of CURT Echo in-line brake controllers with a simple plug-and-play USCAR to USCAR connection.
Yes, the CURT 24" USCAR Wiring Extension Harness (Part #56475) is designed to fit 2017-2022 Audi Q7 models, so your 2020 is covered. It provides 24" of additional length with USCAR to USCAR connectivity and includes a protective slit loom sleeve to keep wires contained.
The CURT 24" USCAR Extension Harness (Part #56475) fits a wide range of vehicles including: 2017-2022 Audi Q7; 2008-2026 Buick Enclave; 2004-2007 Buick Rainier; 2002-2026 Cadillac Escalade; 2003-2026 Cadillac Escalade ESV; 2002-2013 Cadillac Escalade EXT; 2017-2026 Cadillac XT5; 2020-2025 Cadillac XT6; 2007-2013 Chevrolet Avalanche; 2002-2006 Chevrolet Avalanche 1500; 2002-2006 Chevrolet Avalanche 2500; 2019-2026 Chevrolet Blazer; 2004-2026 Chevrolet Colorado; 2018-2022 Chevrolet Equinox; 2009 Chevrolet Express 1500; 2009-2026 Chevrolet Express 2500; Chevrolet Express 3500; 2009 Chevrolet Express 4500; 1999-2026 Chevrolet Silverado 1500; 2007 Chevrolet Silverado 1500 Classic; 2001-2006 Chevrolet Silverado 1500 HD; 2007 Chevrolet Silverado 1500 HD Classic; 2019 Chevrolet Silverado 1500 LD; 2022 Chevrolet Silverado 1500 LTD; 1999-2004 Chevrolet Silverado 2500; 2001-2026 Chevrolet Silverado 2500 HD; 2007 Chevrolet Silverado 2500 HD Classic; 2001-2006 Chevrolet Silverado 3500; 2007 Chevrolet Silverado 3500 Classic; 2007-2026 Chevrolet Silverado 3500 HD; 2015-2026 Chevrolet Suburban; 2000-2014 Chevrolet Suburban 1500; 2000-2013 Chevrolet Suburban 2500; 2016-2019 Chevrolet Suburban 3500 HD; 2000-2026 Chevrolet Tahoe; 2002-2009 Chevrolet Trailblazer; 2002-2006 Chevrolet Trailblazer EXT; 2009-2026 Chevrolet Traverse; 2024 Chevrolet Traverse Limited; and many Ford, GMC, Ram, Toyota and other models from 1997-2026. Always verify your specific year, make, and model before ordering.
Installation is extremely simple with this CURT extension harness - it features a plug-and-play design that eliminates the need for cutting or splicing wires. The installation time is essentially zero minutes since it just plugs between your OEM USCAR socket and USCAR connector. Basic hand tools are typically all you need, and detailed instructions are included.
CURT 56475 is designed for SUVs, vans, and trucks equipped with factory USCAR trailer connectors. The product connects to the existing factory wiring behind the center of the rear bumper (SUVs/vans) or rear bumper fascia (trucks). If your vehicle does not have a factory USCAR connector, this product will not be compatible. Check your vehicle's rear bumper area for an existing trailer connector before purchasing.
CURT 56475 is a wiring extension harness for SUVs, vans, and trucks. It installs between the factory USCAR trailer connector and the trailer connector to extend the wiring. The product is rated as Easy difficulty to install.
You will need a socket set, ratchet, socket extension, and cutting tool. Proper tools will improve the quality of installation and reduce the time required.
Installation involves four steps: (1) Locate any USCAR plugs and loosen the gray locking tab if present by pulling it straight back; the tab can be fully removed and replaced if needed. (2) Push the connection point together, then press the connector release and pull apart the connector. (3) Install the extension harness between the trailer connector and the factory wiring, ensuring all locks snap into place, and zip tie the wiring as needed to secure it behind the bumper. (4) Test functionality using a working trailer or a 7-way tester (CURT Part #58272 or #58273).
A USCAR connector is a factory trailer connector found on some vehicles. It is located behind the center of the rear bumper (on SUVs and vans) or behind the center of the rear bumper fascia (on trucks). The connector may have a gray locking tab that must be loosened before removal. The tab pulls straight back to loosen and can be fully removed and replaced if needed.
Only if your vehicle has one. The locking tab is gray and present only on select vehicles. If present, pull the tab straight back until loosened. The tab can also be fully removed and replaced if needed.
First, loosen the gray locking tab if your vehicle has one by pulling it straight back. Then press the connector release and pull the connector apart.
After installing the extension harness between the trailer connector and factory wiring, ensure all locks snap into place. Then zip tie the wiring as needed to secure it behind the bumper.
Test functionality using either a working trailer or a 7-way tester (CURT Part #58272 or #58273). This ensures the extension harness is properly connected and functioning.
Perform periodic inspection of all wires and connections to ensure there is no visible damage or loose connections. This helps maintain proper function and safety.
Do not exceed the product rating or your tow vehicle's lamp load rating, whichever is lower. Refer to the product specifications or your vehicle's documentation for exact capacity limits.
CURT 56475 fits SUVs, vans, and trucks with factory USCAR trailer connectors located behind the center of the rear bumper or fascia. Your vehicle must have an existing factory connector for this product to work.
Socket set, ratchet, socket extension, and cutting tool.
No, installation is rated as Easy. The process involves locating the factory USCAR connector, disconnecting it, installing the extension harness between the connector and factory wiring, and testing with a trailer or 7-way tester.
Use a working trailer or a 7-way tester (CURT Part #58272 or #58273) to verify proper function after installation.
Periodically inspect all wires and connections to ensure there is no visible damage or loose connections.
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| Part # | Plugs Into | Provides | Output |
|---|---|---|---|
| 55774 | USCAR socket | Two output connections and mounting bracket | 7-way RV blade and 4-way flat |
| 57101 | USCAR socket | Two output connections, backup alarm, and mounting bracket | 7-way RV blade and 4-way flat |
| 55664 | USCAR socket | Two output connections and mounting bracket | 6-way round and 4-way flat |
| 55515 | USCAR socket | Replacement end | 4-way flat |
| 56515 | USCAR socket | Replacement end | 5-way flat |
| 55384 | T's into USCAR socket | Additional connection | 4-way flat |
| 56584 | T's into USCAR socket | Additional connection | 5-way flat |
| 56154 | USCAR socket | Heavy-duty replacement socket | 7-way RV blade |
| 55415 | USCAR socket | Replacement socket | 7-way RV blade |
| 56415 | USCAR socket | Replacement for twist-lock brackets | 7-way RV blade |
| 56475 | USCAR socket | 24" extension | USCAR socket |
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