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Warranty: One-Year Limited Warranty
Color: Black
Electrical System Type: 2W
Output Type: 4-Way Flat
Installation Difficulty: Advanced
Installation Time Exact (Minutes): 10
If your vehicle is not equipped with wiring for towing a trailer, CURT custom wiring is the ideal solution. A custom wiring harness -- also called a T-connector -- is a simple, plug-and-play electrical device that plugs into your automotive electric system and provides a standard, universal trailer wiring connection. This is done using two or more vehicle-specific, OEM-compatible connectors to plug into the taillight assembly, eliminating the need for cutting, splicing and soldering during installation. Custom wiring harnesses are made vehicle-specific, and while they are not available for all vehicles, they do offer one of the fastest, easiest and most secure ways to wire a vehicle for towing. This particular plug-in harness provides a 4-way flat connector socket and is designed to be a custom wiring harness to fit certain years of the Buick LaCrosse (to verify your vehicle compatibility, see application info). It comes with all necessary wiring components to establish a reliable trailer wiring connection, as well as a dust cover to keep the connector clean when not in use. You have a picture in mind of your next destination -- maybe it's the boat landing at your favorite fishing spot, maybe it's a campsite that overlooks one of nature's masterpieces, or maybe it's the next big jobsite. However, turning that picture into a reality takes more than just daydreaming. It takes a solid connection and the right amount of power. CURT custom wiring is made with some of the most sophisticated technology in the industry and is designed to install with ease, giving you a long-lasting electrical connection for your towing hitch setup.
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 888-634-94941 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 2005 - 2009 | Buick LaCrosse | Installation Time: 30-60 minutes |
The CURT 56340 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Buick LaCrosse (Part #BKDK56340) fits the following vehicles: 2005-2009 Buick LaCrosse. Always verify your specific year, make, and model before ordering.
The CURT 56340 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Buick LaCrosse (Part #BKDK56340) fits 2005-2009 Buick LaCrosse models. The 2009 model year is the last year covered by this part number. For newer models, check for an updated version.
Yes, the CURT 56340 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Buick LaCrosse (Part #BKDK56340) is designed to fit the 2005-2009 Buick LaCrosse.
The CURT 56340 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Buick LaCrosse (Part #BKDK56340) Typical installation time is 30-60 minutes. Basic hand tools are typically all you need.
Yes, the Curt 56340 custom wiring harness is designed for Buick LaCrosse passenger cars. The harness connects to the vehicle's taillight wiring connectors behind the rear scuff panels on both the driver and passenger sides.
Buick LaCrosse (passenger cars only).
The Curt 56340 is a custom wiring harness that connects to your vehicle's taillight wiring to provide power for trailer lighting. It features a 4-flat connector for attaching a trailer light plug.
You will need a panel trim removal tool, a flat blade screwdriver, and a cutting tool. These are the minimum tools required to complete the installation.
The harness includes a 4-flat dust cover and cable ties for securing loose wires. The manual does not specify the exact quantity of cable ties or other included components.
Yes, you must disconnect the negative battery terminal before beginning installation. This is the first step in the installation process and is required for safety.
Yes. Disconnect the negative battery terminal on the driver side under the hood before starting.
Remove the rear scuff panel by first removing its fasteners, then pulling out on the bottom and up. Take care not to damage the alignment tabs on the back. Once removed, pull back the felt liner to locate the taillight wiring harness connectors.
Remove the push fastener, cargo fastener, and Phillips screw from the felt liner on the driver side. Repeat this process on the passenger side after routing the harness.
Separate the vehicle's taillight wiring harness connectors from the taillight housing, taking care not to damage the locking tabs. Insert the custom wiring harness end with the yellow wire between the separated connectors on the driver side. Make sure the connectors are fully inserted with locking tabs in place. Repeat on the passenger side using the harness end with the green wire.
The yellow wire end connects to the driver side taillight connectors, and the green wire end connects to the passenger side taillight connectors. These colours identify which end of the harness goes to each side of the vehicle.
When in use, route the 4-flat connector to the center of the vehicle for easy access to your trailer. When not in use, roll it up and store in a convenient, out-of-the-way location to prevent damage.
Secure any loose wires with the provided cable ties. This prevents the wires from moving around and potentially becoming damaged or creating a safety hazard.
Yes, you must reinstall all items removed during installation, including the rear scuff panel and felt liner. After reinstalling, reconnect the negative battery terminal and install the provided 4-flat dust cover.
The manual states you must not exceed the product rating or the tow vehicle lamp load rating, whichever is lower. However, the specific product rating is not provided in the installation instructions. Contact Curt Manufacturing or consult your vehicle's owner manual for the exact amperage or wattage rating.
No. Do not exceed the product rating or tow vehicle lamp load rating, whichever is lower. Exceeding the rating can cause loss of warranty, overheating, and potential fire.
Test for proper function by using a test light or by connecting a properly wired trailer to the 4-flat connector. All steps must be followed to ensure the wiring harness functions properly before use.
Yes, install the provided 4-flat dust cover after reconnecting the battery. The dust cover helps prevent corrosion of the connector when the harness is not in use.
Yes, take care not to damage the alignment tabs on the back of the scuff panel when removing it. Pull out on the bottom first, then up, to avoid breaking these tabs. Damage to the alignment tabs may prevent proper reinstallation.
Yes, take care not to damage the locking tabs on the vehicle's taillight wiring harness connectors when separating them from the taillight housing. Damaged locking tabs may prevent the connectors from seating properly.
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