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Authorized Dealer2023 - 2026 Cadillac LYRIQ
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Complete CURT Class 3 2" trailer hitch and 4-flat custom wiring kit engineered for the 2023 - 2026 Cadillac Lyriq. Vehicle-specific fit, plug-and-play installation, all hardware and instructions included.
This custom kit fits the following vehicles:
All Hardware and Installation Instructions Included!
Whatever your task at hand — whether it's launching that boat before daybreak, setting up your camper before the rush or getting a final load to the dump before close — CURT class 3 trailer hitches offer the strength needed for serious towing. They make it easy to hitch up and Bring It, offering a vehicle-specific fit and the weight capacity to handle a variety of trailers. Custom class 3 hitches are the most common type of receiver hitch for pickup trucks and SUVs. Because of their weight range, they are also found on full-size cars, crossovers and minivans. Each custom-fit class 3 hitch package is made for vehicle-specific mounting. This particular kit fits certain years of the Cadilac LYRIQ, Chevrolet Equinox EV, and Honda Prologue (see application info to verify vehicle compatibility). It provides a weight carrying capacity of 3,500 lbs. GTW and 350 lbs. TW. CURT class 3 trailer hitches are typically used to attach and haul utility trailers, boat trailers, campers, snowmobile or ATV haulers and more (NOTE: Never exceed the lowest-rated towing component). Each class 3 hitch has a 2" receiver tube and is tested in accordance with SAE J684 for safety. To ensure that CURT class 3 receiver hitches have what it takes for serious trailering, they are designed using a hands-on approach and are constructed with rugged, high-strength steel and precise welding. We also protect our class 3 hitches in a co-cured finish of liquid A-coat and black powder coat for superior resistance to rust, chipping and UV damage.
CURT custom wiring connectors are the easiest way to outfit your vehicle with a CURT trailer wiring connection. They are built with some of the most advanced technology in the industry, and each one is custom-fitted to work with a specific make and model. Some automotive manufacturers install a special socket on the vehicle to be used for vehicle-to-trailer wiring. Although this special socket is not equipped on every vehicle, a CURT custom wiring connector -- also called a T-connector -- utilizes the socket for simple, stress-free installation. Rather than requiring you to cut, splice and solder into your vehicle's wiring system, the custom wiring connector uses a single OEM-compatible plug and instantly provides a standard, universal vehicle-to-trailer wiring connection, typically in the form a 4-way flat. All CURT custom wiring connectors are made vehicle-specific for the easiest possible installation and the best fit. This particular plug-in connector provides a 4-way flat socket and is designed to be a custom wiring option for certain years of the Cadillac XT4, Lyriq, Chevrolet Blazer EV, Equinox EV, and Honda Prologue (to verify your vehicle compatibility, see application info). It comes with all necessary hardware to establish a solid connection. It also comes with a dust cover to keep the connector socket clean when not in use. To ensure long-lasting reliability, all CURT custom wiring connectors are thoroughly tested for optimal functionality. Stress is the last thing you should feel when towing a trailer -- whether you're hauling your RV to that favorite camping destination, your ATVs up to the hunting grounds or your fishing boat to the new hidden hotspot. At CURT, we think your towing equipment should add to the enjoyment of your experience, not detract from it.
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 888-634-9494Limited Lifetime (One-year finish, one-year parts)
Yes, CURT part 56427 is designed for the Cadillac XT4. Installation requires disconnecting the negative battery terminal before beginning work.
Yes, CURT part 56427 is designed for the Cadillac Lyriq. The installation procedure differs from the XT4; the vehicle must be turned off but the battery does not need to be disconnected.
Yes, CURT part 56427 is designed for the Chevy Blazer, including the Blazer EV. The installation procedure differs from the XT4; the vehicle must be turned off but the battery does not need to be disconnected.
You will need a ratchet or wrench and a cutting tool. For Cadillac Lyriq and Chevy Blazer models, you will also need a 7mm socket (for Blazer EV) or T-15 Torx bit (for Lyriq) and a trim tool.
Yes. For the Cadillac XT4, you must locate the vehicle battery (refer to your vehicle owner's manual for location), disconnect the negative battery terminal, and fasten this wire down and away from the battery during installation.
No. For the Cadillac Lyriq and Chevy Blazer, you do not need to disconnect the battery. Simply ensure the vehicle is turned off before beginning installation.
1. Disconnect the negative battery terminal and fasten it away from the battery. 2. From under the rear bumper cover, locate the housing with dust cover. 3. Slide the red lock back, press the housing lock in, and remove the dust cover. 4. Install the custom wiring harness and slide the red lock back into the locked position. 5. Zip tie the harness as needed with the 4-flat mounted near the receiver hitch. 6. Test the harness with a test light, 4-flat tester, or functioning trailer. 7. Reinstall all removed items and reconnect the negative battery terminal. 8. Install the provided 4-flat dust cover.
1. Ensure the vehicle is turned off. 2. From under the rear bumper, locate the plastic facias. 3. Remove the facias using a 7mm socket (Blazer EV) or T-15 Torx bit (Lyriq). Remove all 16 screws and use a trim tool to remove 2 push fasteners. 4. On the passenger side, locate the backup alarm. Just above and to the rear of the backup alarm, find the black connector with white filler blocks. Locate the red tab, push it towards the white filler blocks, and press the housing release to remove the dust cover. 5. Install the custom wiring harness and slide the red lock back into the locked position. 6. Zip tie the harness as needed with the 4-flat mounted near the receiver hitch. 7. Test the harness with a test light, 4-flat tester, or functioning trailer. 8. Reinstall all removed items and install the provided 4-flat dust cover.
From under the vehicle rear bumper, locate the plastic facias. For Chevy Blazer EV, use a 7mm socket to remove the fasteners. For Cadillac Lyriq, use a T-15 Torx bit. Remove all 16 screws and use a trim tool to remove 2 push fasteners.
On the passenger side, locate the backup alarm. Just above and to the rear of the backup alarm, there is a black connector with white filler blocks protruding. Locate the red tab and push it towards the white filler blocks, then press the housing release to remove the dust cover.
Slide the red lock back, press the housing lock in, and remove the dust cover. Install the custom wiring harness into the connector and slide the red lock back into the locked position.
Zip tie the harness as needed with the 4-flat mounted near the receiver hitch. This secures the harness and prevents movement.
Once the harness is connected, verify that it is functioning by attaching the battery (if disconnected) and testing with a test light, 4-flat tester, or a functioning trailer. This confirms proper operation before final reassembly.
Reinstall all items removed during installation. If the negative battery terminal was disconnected at the beginning (XT4 only), reconnect it. Install the provided 4-flat dust cover to help prevent corrosion.
Periodic inspection of all wires and connections should be performed to ensure there is no visible damage or loose connections.
Do not exceed the product rating or tow vehicle lamp load rating, whichever is lower. Refer to the product documentation or contact CURT for the specific rating.
Do not lay tools across the positive terminal (typically labeled with red covers or a red '+' symbol). This can cause a ground short, resulting in sparks and/or electrical shocks.
CURT part 56427 fits the Cadillac XT4, Cadillac Lyriq, and Chevy Blazer (including Blazer EV).
You will need a ratchet or wrench and a cutting tool. For Lyriq and Blazer models, also a 7mm socket (Blazer EV) or T-15 Torx bit (Lyriq) and a trim tool.
Battery disconnection is required for Cadillac XT4 only. For Cadillac Lyriq and Chevy Blazer, simply turn off the vehicle.
The manual does not mention drilling as a required step for any supported vehicle model.
Do not exceed the product rating or tow vehicle lamp load rating, whichever is lower. Do not lay tools across the positive battery terminal to avoid shorts and electrical shocks.
The CURT 13617 has a gross trailer weight (GTW) capacity of 3,500 lbs and a tongue weight (TW) capacity of 350 lbs. Never exceed your vehicle manufacturer's recommended towing capacity.
Yes. The installation requires hole enlargement at the access holes and mounting holes in the vehicle frame rail. A die grinder or rotary tool is needed to enlarge these holes.
Required tools: ratchet, torque wrench, 7mm socket, 3/4" socket, 3" socket extension, die grinder, rotary tool, and T-15 Torx bit. A fishwire tool is also needed for the mounting technique. For a complete tools reference guide, visit curtmfg.com/trailer-hitch-installation.
Yes. The installation requires temporary removal of the underbody panel and trim. The panel is removed in Step 1 using a T-15 Torx bit and 7mm socket, trimmed in Step 3 following the trim diagram, and reinstalled in Step 5 after torquing the hitch hardware.
Torque all 1/2" hardware to 90 ft-lbs. Use a torque wrench to ensure proper tightness and prevent damage to the product or vehicle.
Wear safety glasses at all times during installation. Never exceed your vehicle manufacturer's recommended towing capacity. After installation, perform periodic inspection to ensure all mounting hardware remains tight and structural components are secure.
The CURT 13617 package includes: 1 trailer hitch, 4 carriage bolts (1/2"-13 x 1-3/4"), 4 serrated-flange nuts (1/2"-13), and 4 spacers (1/4" x 1" x 2-1/2"). All hardware needed for mounting is included.
CURT rates this installation as moderate difficulty. The level depends on your expertise, vehicle condition, and access to proper tools. The installation involves removing and trimming the underbody panel, enlarging holes, and using a fishwire technique to route bolts through the frame rails.
The manual does not specify which vehicle makes, models, or years are compatible with CURT 13617. Contact CURT product support at 877.287.8634 or visit curtmfg.com to confirm fitment for your specific vehicle before purchasing.
The fishwire technique guides the carriage bolts and spacers through the vehicle frame rails. Insert the coiled end of the fishwire through the hitch mounting hole and out the access hole. Pass the coiled end through a spacer and thread the bolt into the coil. Kink the wire to keep the spacer separate from the bolt. Pull the fishwire, spacer, and bolt through the frame and out the mounting hole. The fishwire prevents loss of bolts or spacers inside the frame rail and guides the hitch during mounting.
Follow these steps in order: (1) Remove the underbody panel using a T-15 Torx bit and 7mm socket. (2) Enlarge the access holes and fishwire the carriage bolts and spacers into the mounting holes, leaving fishwires attached. (3) Trim the underbody panel following the trim diagram (7-1/2" and 38-7/8" dimensions). (4) Raise the hitch into position and fishwire the carriage bolts through the holes, then loosely secure with 1/2" serrated-flange nuts. (5) Torque all 1/2" hardware to 90 ft-lbs and reinstall the trimmed underbody panel.
Leave the bolts loose initially. In Step 4, loosely secure the carriage bolts using the 1/2" serrated-flange nuts. Only in Step 5, after the hitch is positioned and all bolts are in place, torque all 1/2" hardware to 90 ft-lbs using a torque wrench.
The underbody panel must be trimmed following the trim diagram provided in Step 3. The diagram shows two dimensions: 7-1/2" and 38-7/8". Remove the panel in Step 1, trim it according to these measurements, and reinstall it in Step 5 after torquing the hitch hardware.
The CURT 13617 uses four carriage bolts, each 1/2"-13 x 1-3/4" in size. They are secured with 1/2"-13 serrated-flange nuts and torqued to 90 ft-lbs. Spacers (1/4" x 1" x 2-1/2") are placed between the bolts and the vehicle frame.
CURT 13617 uses four carriage bolts (1/2"-13 x 1-3/4") with four matching serrated-flange nuts (1/2"-13) and four spacers (1/4" x 1" x 2-1/2"). These are the only fasteners that secure the hitch to the vehicle frame.
In Step 1, remove sixteen (16) screws using a T-15 Torx bit, four (4) hex-head screws using a 7mm socket, and two (2) push pins. These fasteners hold the underbody panel in place and must be removed to access the frame rails for hitch mounting.
Periodic inspection of the trailer hitch should be performed to ensure all mounting hardware remains tight and structural components are secure. Check that the 1/2" bolts and nuts have not loosened and that the hitch is properly seated. Refer to the specified torque specification (90 ft-lbs for 1/2" hardware) if retightening is needed.
CURT 13617 is rated for a gross trailer weight (GTW) of 3,500 lbs and tongue weight (TW) of 350 lbs. However, you must never exceed your vehicle manufacturer's recommended towing capacity, which may be lower than the hitch rating. Always follow your vehicle's specifications.
1 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 2023 - 2026 | Cadillac LYRIQ | — |
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