2016-2020 Cadillac CT6 Liftgate Hinge Cover: Part Numbers, Fitment, and Replacement
This guide covers the common causes of damage, correct part numbers, and the critical compatibility warning for non-hybrid models.
- This cover will NOT fit the Cadillac CT6 Plug-In Hybrid (PHEV) models due to differences in the rear body structure.
- The part is side-specific (Left/Driver vs. Right/Passenger) and part numbers have been updated by GM; verify the correct number for your specific side.
- Failure is always cosmetic (cracks, missing part) and will not trigger warning lights or affect vehicle operation.
- When buying a used cover, the most important inspection is to ensure all mounting tabs on the back are intact and not cracked.
Key Part Number Information
The liftgate hinge covers for the 2016-2020 Cadillac CT6 are side-specific, meaning there are distinct parts for the driver (left) and passenger (right) sides. Over the production run, General Motors updated these part numbers. It is crucial to order the correct part for the specific side you need to replace.
| Position | Original Part Number | Superseded By | Notes |
|---|---|---|---|
| Left (Driver Side) | 22996414 | 84087880 | Verify fitment using your VIN. An eBay listing also identifies this as the left side. |
| Right (Passenger Side) | Unavailable in search | Unavailable in search | Contact a dealer with your VIN to confirm the correct passenger side part number. |
Warning: The part numbers listed here are for standard gasoline models only. These covers will NOT fit the 2017-2018 Cadillac CT6 Plug-In Hybrid (PHEV) model. The rear body structure around the trunk was modified to accommodate the high-voltage battery system, resulting in different hinge and trim piece designs.
Symptoms of a Failing Liftgate Hinge Cover
Failure of this part is always visual. Since it is a non-mechanical trim piece, it will not trigger any warning lights or diagnostic trouble codes (DTCs). Symptoms are straightforward:
- Visible Cracks: The plastic can become brittle over time due to UV exposure and temperature cycles, leading to stress cracks. Impact from garage doors or other objects is also a common cause.
- Broken Mounting Tabs: The cover is held in place by plastic clips or tabs. If these break, the cover will become loose, rattle, or fall off completely.
- Faded or Peeling Paint: Like any exterior painted part, the finish can degrade over time, leading to a poor cosmetic appearance.
- Missing Cover: Often, a cover with broken tabs will simply fall off while driving or during a car wash.
Known Issues, TSBs, and Recalls
There are no specific recalls or Technical Service Bulletins (TSBs) issued by GM or the NHTSA for the liftgate hinge covers themselves. However, technicians and owners should be aware of related liftgate system issues.
TSB for Hands-Free Liftgate Operation
GM issued TSB #17-NA-153 for various models, including the 2016-2019 Cadillac CT6, regarding the hands-free liftgate feature. If a customer reports the 'kick' feature works intermittently or not at all, it is not a fault of the hinge cover. The bulletin notes that the feature can be temporarily disabled after several consecutive uses and can be re-enabled by operating the liftgate via another method (key fob, interior button) or by starting the vehicle.
Pro Tip: Some owners of GM vehicles have reported that clogged sunroof drain tubes can cause water to leak into the trunk area, potentially damaging the liftgate control module and other electronics. If you are experiencing strange electrical behavior with your liftgate, inspect the spare tire well for any signs of water intrusion before replacing expensive components.
Buying a Used Liftgate Hinge Cover
A used OEM hinge cover is an excellent, cost-effective option, as aftermarket versions are not commonly available. Since fit and color match are critical, a recycled original part is often the best choice. Before purchasing, perform these checks:
- Inspect for Cracks: Carefully examine the entire part, especially around the edges and corners, for any hairline cracks that could worsen upon installation.
- Verify All Mounting Tabs: This is the most critical check. Turn the cover over and ensure every mounting tab and clip receiver is present and free of stress marks or fractures. A cover with even one broken tab may not sit flush or could fall off.
- Check Paint Condition: Look for deep scratches, peeling clear coat, or significant fading. Match the color to your vehicle, but be aware that sun exposure can cause slight variations between a used part and your car.
- Confirm the Correct Side: Double-check whether you are buying the left (driver) or right (passenger) side cover. They are not interchangeable.
Cost Comparison
| Part Source | Estimated Cost (USD) | Notes |
|---|---|---|
| New OEM | $40 - $70 | Purchased from a GM dealership or online OEM parts retailer. Comes pre-painted. |
| Used OEM | $15 - $40 | Found on eBay or from automotive recyclers. Price depends on condition and color. |
| New Aftermarket | Not Commonly Available | This type of specific cosmetic trim is rarely produced by aftermarket companies. |
| Shop Labor | $30 - $50 | Most shops will charge a minimum fee, likely 0.2-0.3 hours of labor for this simple task. |
Installation Guide
Replacing the liftgate hinge cover is a simple task suitable for any DIY skill level.
- Difficulty: 1 out of 5
- Estimated Time: 5-10 minutes
Removal:
- Open the liftgate fully.
- Carefully pry the old cover off. It is typically held on by pressure clips. Use a plastic trim removal tool to avoid scratching the paint on the body or liftgate. Start at one edge and gently work your way around until the clips release.
Installation:
- Clean the area underneath where the new cover will sit.
- Align the tabs on the new cover with the corresponding slots on the vehicle's body.
- Firmly press the cover into place. You should hear and feel the clips snap securely into position.
- Gently tug on the cover to ensure it is fully seated and not loose.
Frequently Asked Questions (FAQ)
Is the liftgate hinge cover side-specific?
Yes, there are unique parts for the left (driver side) and right (passenger side). They are not interchangeable, so you must order the correct part for the side you are replacing.
Will this part fit my 2018 CT6 Plug-In Hybrid?
No. The liftgate hinge covers for the standard gasoline-powered CT6 are not compatible with the Plug-In Hybrid (PHEV) models from 2017-2018. The rear body structure of the PHEV is different to accommodate the battery pack.
Do I need to paint a new or used hinge cover?
A new OEM hinge cover from a dealer will come pre-painted in the correct factory color if you provide your VIN. A used cover should already match if it comes from a vehicle with the same paint code, though minor fading from sun exposure is possible.
My hands-free liftgate doesn't work. Is the hinge cover the problem?
No, the hinge cover is a simple plastic trim piece and has no electronic function. If your hands-free kick sensor is not working, the issue is related to the sensor, the control module, or vehicle settings. Refer to GM Technical Service Bulletin #17-NA-153 for troubleshooting tips.
Technical Specifications
OEM Part Numbers: 22996414 84087880
Material: Painted Plastic
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Cadillac CT6: