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Shipping from Eau Claire, WIFREE SHIPPING
Estimated delivery Mon, Sep 7 - Wed, Sep 9
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Vehicle battery connection required
Warranty: One-Year Limited Warranty
Electrical System Type: 3W
Output Type: 4-Way Flat
Tail Light Circuits: 6.0 Amps
Turn and Brake Circuits: 3.0 Amps
Installation Difficulty: Professional
Installation Time Exact (Minutes): 45
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 |
|---|---|---|
| 2010 - 2016 | Buick LaCrosse | Installation Time: 30-60 minutes |
The CURT 56098 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Buick LaCrosse (Part #BKDK56098) fits 2010-2016 Buick LaCrosse models. The 2016 model year is the last year covered by this part number. For newer models, check for an updated version.
The CURT 56098 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Buick LaCrosse (Part #BKDK56098) fits the following vehicles: 2010-2016 Buick LaCrosse. Always verify your specific year, make, and model before ordering.
Yes, the CURT 56098 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Buick LaCrosse (Part #BKDK56098) is designed to fit the 2010-2016 Buick LaCrosse.
The CURT 56098 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Buick LaCrosse (Part #BKDK56098) Typical installation time is 30-60 minutes. Basic hand tools are typically all you need.
Yes, the Curt 56098 is designed for Buick LaCrosse passenger cars. The harness connects to the vehicle's taillight wiring and includes connectors that match the factory taillight housing connectors.
The Curt 56098 is a custom wiring harness that provides trailer lighting connections for a Buick LaCrosse. It taps into the vehicle's taillight circuits and includes a converter box to manage signal and running light circuits for trailer use.
You will need a Phillips screwdriver, flat blade screwdriver, and panel trim removal tool. These are the only tools required for installation.
The harness includes: custom wiring harness with yellow and green wire ends, white ground wire with ring terminal, black power wire, black converter box, provided screw for grounding, double-sided tape, cable ties, and a 4-flat dust cover.
The manual does not explicitly state whether the battery must be disconnected. However, since the installation involves working with the vehicle's electrical system and taillight connectors, it is recommended to consult the vehicle owner's manual or contact the vehicle manufacturer for safety guidance.
Open the tailgate and remove the scuff panel by pulling out at the bottom and then up. Remove the plastic fasteners securing the felt trunk liner on both sides. Remove the four plastic wing nuts securing each taillight assembly. The taillight assembly will then lift away to reveal the vehicle's taillight wiring harness connectors.
The custom wiring harness end with the yellow wire connects at the driver side taillight, and the end with the green wire connects at the passenger side taillight. Both ends insert between the separated vehicle taillight connectors, with the locking tabs fully engaged.
Insert the custom wiring harness end (yellow wire for driver side, green wire for passenger side) between the separated vehicle taillight connectors. Ensure the connectors are fully inserted and the locking tabs are in place. Take care not to damage the locking tabs during insertion.
Drilling may be required for the ground wire connection. You can either locate an existing screw with nut in the vehicle frame to secure the white ground wire's ring terminal, or drill a 3/32" pilot hole if no suitable existing fastener is available. Before drilling, check for miscellaneous items that may be hidden behind or under any surface to avoid damage and personal injury.
The pilot hole size is 3/32". This hole is drilled only if no existing screw with nut is available in the vehicle frame near the taillight connector.
The battery connection must be fuse-protected with a maximum of 10 amps. Exceeding this rating can cause loss of warranty, overheating, and potential fire. Do not exceed the product rating or the tow vehicle lamp load rating, whichever is lower.
Signal circuits are rated at 3.0 amps per side. Tail and running circuits are rated at 6.0 amps total. Do not exceed these ratings or the tow vehicle lamp load rating, whichever is lower.
The black converter box should be adhered to a flat spot inside the vehicle near the taillight using the provided double-sided tape. The location should be convenient and secure.
When in use, route the 4-flat to the center of the vehicle and out of the trunk. When not in use, roll it up and store in a convenient, out-of-the-way location inside the trunk. Secure any loose wires with the provided cable ties.
Test for proper function by using a test light or by connecting a properly wired trailer. All installation steps must be followed to ensure the wiring harness functions properly.
The scuff panel is removed to access the taillight area. It should be reinstalled at the end of the installation (Step 10). When removing it, take care not to damage the alignment tabs on the back, as these are needed for proper reinstallation.
Yes, the plastic wing nuts that secure each taillight assembly should be reused. They are removed during installation to access the taillight connectors and must be reinstalled when reassembling the taillight housings.
Remove the plastic fasteners securing the felt trunk liner on both sides of the vehicle and pull the liner back to access the taillight assemblies. The liner should be reinstalled after the wiring harness installation is complete.
Before drilling the 3/32" pilot hole for the ground wire screw, check for miscellaneous items that may be hidden behind or under any surface. This precaution avoids damage to hidden components and personal injury.
The area where the white ground wire is secured should be free of rust, dirt, and paint. This ensures a proper electrical connection. The ring terminal should be secured using the provided screw to either an existing screw with nut in the vehicle frame or to a 3/32" pilot hole you drill.
Install the provided 4-flat dust cover on the connector to help prevent corrosion. This should be done during the final reassembly step.
Yes, the Curt 56098 is designed for Buick LaCrosse passenger cars.
You need a Phillips screwdriver, flat blade screwdriver, and panel trim removal tool.
Drilling may be required for the ground wire connection. You can use an existing screw in the vehicle frame or drill a 3/32" pilot hole if needed.
The battery connection must be fuse-protected at a maximum of 10 amps. Exceeding this can cause overheating and fire.
Test using a test light or by connecting a properly wired trailer to verify proper function.
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