CURT Custom Wiring Harness, 4-Way Flat Output, Select Buick Envista 56522CURTOriginal price was $147.95. Current price is $117.99.In Stock
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2024 - 2026 Buick Envista
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Fuse holder
Battery connection wiring
Dust cover
Necessary wiring components
| Warranty | One-Year Limited |
| Connector Gender | Male Female |
| Terminal Gender | Female |
| Terminal Type | Pin |
| Turn and Brake Circuits | 3.0 Amps |
| Tail Light Circuits | 6 Amps |
| Warranty | One-Year Limited Warranty |
| Material | Thermoplastic Rubber |
| Vehicle Compatibility | Buick Envista (specific years) |
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 Envista (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 888-634-9494One-Year Limited
1 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 2024 - 2026 | Buick Envista | — |
Yes, the CURT Custom Wiring Harness, 4-Way Flat Output, Select Buick Envista 56542 (Part #BKDK56542) is designed to fit the 2024-2026 Buick Envista.
The CURT Custom Wiring Harness, 4-Way Flat Output, Select Buick Envista 56542 (Part #BKDK56542) fits the following vehicles: 2024-2026 Buick Envista. Always verify your specific year, make, and model before ordering.
The CURT Custom Wiring Harness, 4-Way Flat Output, Select Buick Envista 56542 (Part #BKDK56542) fits 2024-2026 Buick Envista models. The 2026 model year is the last year covered by this part number. For newer models, check for an updated version.
The CURT Custom Wiring Harness, 4-Way Flat Output, Select Buick Envista 56542 (Part #BKDK56542) Refer to the included instructions for installation details. Basic hand tools are typically all you need.
The Curt 56542 is a powered converter harness designed for SUVs and vans. It converts 12-volt vehicle electrical signals to a 4-flat trailer connector, allowing you to connect a trailer with lighting and brake functions. The system includes wiring for turn signals (green and yellow), brake (red), taillight (brown), and ground (white), plus a power converter module that mounts in the trunk.
The Curt 56542 is designed for SUVs and vans with 12-volt negative ground electrical systems. The manual does not specify individual vehicle makes, models, or years. Consult the product fitment database or contact Curt Manufacturing to confirm compatibility with your specific vehicle.
No. The Curt 56542 is designed only for 12-volt negative ground electrical systems. It cannot be used on 24-volt systems or vehicles with positive ground systems.
Required tools are: ratchet, utility knife, 10mm socket, wire crimper, wire cutter, panel trim removal tool, and wire stripper. Proper tools will improve installation quality and reduce time required.
The kit includes: custom wiring harness with yellow, green, brown, and white wires; 4-flat connector; converter module; ground screw; cable ties; sealant for the grommet; double-sided tape for mounting the converter; 4-flat dust cover; and a fuse holder with 10-amp fuse. The fuse should be installed after all other installation steps are complete.
Yes. You must disconnect the negative battery terminal in the engine compartment on the driver side before beginning installation. Fasten this wire down and away from the battery while completing the installation. Reconnect it only after all other steps are complete and before testing the harness.
The manual requires you to remove the trunk floor coverings and expose the spare tire to access the trunk floor, but does not explicitly state whether the spare tire itself must be removed. You will need to access the area behind the taillight housings and under the threshold. Consult your vehicle's owner's manual or contact Curt Manufacturing if you are unsure whether the spare tire must be removed for your specific vehicle.
The installation difficulty is rated as Easy. However, the actual difficulty may vary depending on your expertise level, the condition of your vehicle, and whether you have the proper tools and equipment.
The taillight connectors have an external lock. Push the red tab towards the housing wire until it clicks to release the lock, then pull the housing apart. Insert the custom wiring end (yellow wire on driver side, green wire on passenger side) between the separated connectors. Make sure the connectors are fully inserted with locking tabs in place. The brown wire is installed separately between the factory wiring at the taillight housing.
Route the green, brown, and 4-flat wires along the back wall of the vehicle and under the threshold. Leave the brown and 4-flat wires at the center of the vehicle and route only the green wire to the passenger side. The yellow wire connects to the driver-side taillight housing, and the green wire connects to the passenger-side taillight housing. The brown wire is routed to the driver side and installed between the factory wiring at the taillight housing.
Cut a slit in the rubber grommet large enough to allow it to fit around the new custom wiring. Reseat the grommet around the brown and 4-flat wires in its original hole in the rear of the trunk hatch on the driver side. Use the provided sealant to seal the cut in the grommet and around all the wires to prevent water intrusion.
Route the 4-flat connector to the center of the vehicle near the receiver hitch. When in use, route the 4-flat out of the trunk. When not in use, roll it up and store it in a convenient, out-of-the-way location inside the trunk. Secure any loose wires with the provided cable ties.
You should first locate an existing screw or bolt on the vehicle frame to use as a grounding point. If no suitable existing fastener is available, you may drill a 3/32-inch pilot hole. Before drilling, check for miscellaneous items that may be hidden behind or under any surface to avoid damage and personal injury. The area should be free from rust, dirt, and paint; use an abrasive pad or paper to remove rust and paint if necessary.
The signal circuits (turn signals) are rated for 3.0 amps per side.
The tail and running light circuits are rated for 6.0 amps total.
The battery connection must be fuse-protected with a 10-amp maximum fuse. Exceeding this rating can cause loss of warranty, overheating, and potential fire. The fuse should be installed after all other installation steps are complete.
The power wire should be 12 gauge or larger. Route the 12 GA wire to the vehicle battery location, taking care to avoid any pinch points and hot or rotating components.
The pilot hole size is 3/32 inch. Drill this hole only if no existing screw or bolt is available on the vehicle frame for the ground connection.
Yellow = Left turn signal; Green = Right turn signal; Red = Brake; Brown = Taillight; White = Ground.
When passing the power wire through sheet metal, use an existing grommet, add a new grommet, or use silicone to protect the power wire from sharp edges.
Use a ring terminal for the battery connection. The white ground wire also uses a ring terminal, which should be attached to the vehicle body using the provided screw or a drilled 3/32-inch hole.
Do not exceed the product rating or the tow vehicle lamp load rating, whichever is lower. Consult your vehicle owner's manual or contact the vehicle manufacturer for the specific lamp load rating of your vehicle.
Disconnect the negative battery terminal before beginning installation. Do not lay tools across the positive battery terminal (typically noted with red covers or a red '+' symbol), as this can cause a ground short resulting in sparks and/or electrical shocks. Fasten the negative battery wire down and away from the battery while completing the installation.
Before drilling, check for miscellaneous items that may be hidden behind or under any surface to avoid damage and personal injury. This is especially important when drilling the 3/32-inch pilot hole for the ground screw.
After connecting the 12-volt power wire to the harness, verify that the harness is functioning by attaching the battery and testing with a test light, 4-flat tester, or a functioning trailer. The manual also recommends reading all instructions thoroughly and following all steps to ensure the product functions properly.
Reinstall all items removed during installation. If the negative battery terminal was disconnected, reconnect it. Install the provided 4-flat dust cover to help prevent corrosion. Test the harness with a test light, 4-flat tester, or functioning trailer to verify proper operation.
Periodic inspection of all wires and connections should be performed to ensure there is no visible damage or loose connections. Install the provided 4-flat dust cover to help prevent corrosion when the connector is not in use.
The Curt 56542 is designed for SUVs and vans with 12-volt negative ground electrical systems. Check your vehicle's electrical system specification and consult the Curt fitment database or contact the manufacturer to confirm compatibility with your specific make, model, and year.
You will need a ratchet, utility knife, 10mm socket, wire crimper, wire cutter, panel trim removal tool, and wire stripper.
Yes, you must disconnect the negative battery terminal before beginning installation and reconnect it only after all other steps are complete.
Drilling is not always required. You should first locate an existing screw or bolt on the vehicle frame for the ground connection. Only if no suitable existing fastener is available should you drill a 3/32-inch pilot hole.
The battery connection must use a 10-amp maximum fuse. Exceeding this rating can cause overheating and fire.
The power wire must be 12 gauge or larger.
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