The APDTY 154349 power liftgate actuator rod is a direct-replacement component that powers the automatic opening and closing of the rear hatch on select General Motors crossover vehicles. When this actuator rod fails, the liftgate may refuse to open, close slowly, or stop mid-cycle. This part replaces OE numbers 20812019, 15118853, and 15878421 and restores full power-liftgate operation.
Key Takeaways
- Direct replacement for GM OE part numbers 20812019, 15118853, and 15878421
- Fits 2008-2017 Buick Enclave, 2007-2016 GMC Acadia (including 2017 Acadia Limited), and 2007-2010 Saturn Outlook
- Restores powered opening and closing of the rear liftgate
- Solves common failures: liftgate won't open, closes too slowly, or stops halfway
- Brand-new aftermarket unit designed for direct bolt-in installation
Buy APDTY 154349 directly from APDTY
What Does the Power Liftgate Actuator Rod Do?
The power liftgate actuator rod is an electromechanical strut that physically lifts and lowers the rear hatch when you press the key fob button, dashboard switch, or hatch-mounted release. Unlike a passive gas strut that only supports the weight of the hatch, this actuator rod contains an electric motor and extension mechanism that actively pushes the liftgate open or pulls it closed.
Inside the rod, a small DC motor drives a screw or cable assembly that extends and retracts the rod length. The vehicle's body control module sends power to the actuator when you command a liftgate cycle, and the rod pushes upward to open or retracts to close. When the actuator rod wears out or the internal motor fails, the hatch loses its powered function and may become difficult or impossible to operate automatically.
What Are the Symptoms of a Failing Liftgate Actuator Rod?
A worn or failed power liftgate actuator rod will produce several recognizable symptoms:
- Liftgate will not open automatically: You press the button, hear a click or hum, but the hatch does not lift. The actuator motor may be burned out or the internal mechanism jammed.
- Liftgate opens very slowly or stops halfway: The rod extends partially but lacks the force to complete the cycle. This indicates a weak motor, low lubrication, or internal binding.
- Liftgate closes unevenly or with excessive force: One side retracts faster than the other, or the hatch slams shut because the actuator cannot modulate descent speed.
- Grinding, clicking, or buzzing noises during operation: Internal gears or the drive screw may be stripped or misaligned.
- Error message or warning light on the dash: Some vehicles display a liftgate fault code when the actuator fails to reach its expected position within the allotted time.
If you experience any of these issues, inspect both the left and right actuator rods. Often one rod fails first, but both may be near end-of-life if the vehicle has high mileage or sees frequent liftgate use.
Which Vehicles Does APDTY 154349 Fit?
APDTY part number 154349 is confirmed to fit the following General Motors crossover models:
| Make | Model | Years |
|---|---|---|
| Buick | Enclave | 2008–2017 |
| GMC | Acadia | 2007–2016, plus 2017 Acadia Limited |
| Saturn | Outlook | 2007–2010 |
These vehicles share the GM Lambda platform and use an identical power liftgate system. The APDTY 154349 replaces original-equipment part numbers 20812019, 15118853, and 15878421. Before ordering, verify your vehicle's year and trim in the live compatibility chart on the product page, as some base trims may not have been equipped with the power liftgate option.
APDTY 154349 Specifications and Design
This actuator rod is manufactured to meet or exceed OE performance standards and includes all necessary mounting hardware for a direct bolt-in replacement:
| Specification | Detail |
|---|---|
| APDTY Part Number | 154349 |
| Replaces OE Numbers | 20812019, 15118853, 15878421 |
| Type | Electric power liftgate actuator rod |
| Construction | Steel tube, internal DC motor and extension mechanism |
| Mounting | Ball-socket ends, direct OE-style attachment points |
| Condition | Brand new |
| Warranty | Verify warranty details at time of purchase |
Each actuator rod is tested for proper extension speed, retraction force, and electrical draw to ensure reliable liftgate operation over thousands of cycles.
How to Install the Power Liftgate Actuator Rod
Replacing a power liftgate actuator rod is a straightforward mechanical task that most DIYers can complete in under an hour per side. Follow these general steps:
- Disconnect the vehicle battery to prevent accidental liftgate activation or electrical shorts.
- Open the liftgate fully and support it with a prop rod or have an assistant hold it. If the old actuator is partially functional, use the manual override to open the hatch.
- Remove the liftgate trim panel on the affected side to access the actuator mounting points. This typically requires removing plastic clips and a few screws.
- Disconnect the electrical connector from the actuator rod. Press the release tab and pull the connector straight off.
- Remove the lower mounting bolt or clip at the body-side anchor point, then remove the upper bolt at the liftgate-side anchor. The old actuator will now be free.
- Install the new APDTY 154349 actuator by reversing the removal steps. Align the ball-socket ends with the factory mounting points and secure with the original bolts or the supplied hardware.
- Reconnect the electrical plug and ensure it clicks into place.
- Reinstall the trim panel, reconnect the battery, and test the liftgate through several open-close cycles.
If you are replacing only one actuator, the liftgate may still function but may open or close unevenly. For balanced operation and longevity, consider replacing both left and right actuators at the same time, especially on high-mileage vehicles.
Safety note: The liftgate is heavy. Always support it securely before disconnecting any actuator or strut. Do not rely solely on a single worn strut to hold the hatch open.
Frequently asked questions
Do I need to replace both liftgate actuator rods at once?
It is not required, but recommended. If one actuator has failed, the opposite side has experienced the same wear and mileage and may fail soon. Replacing both ensures balanced operation and avoids a second repair job shortly after.
Will this part work on a 2018 or newer GMC Acadia?
No. The 2018+ Acadia is a different generation and platform. This actuator fits only 2007–2016 Acadia and the 2017 Acadia Limited, which carried over the previous-generation body. Check the live compatibility chart on the product page for your specific year and trim.
Can I manually open the liftgate if the actuator rod fails?
Yes. Most vehicles with power liftgates have a manual release or bypass. You may need to pull a release handle inside the cargo area or disconnect the actuator electrically to lift the hatch by hand. Refer to your owner's manual for the emergency procedure.
What is the difference between 20812019, 15118853, and 15878421?
These are all GM original-equipment part numbers for the same power liftgate actuator rod. GM issued supersession updates over the years, but all three numbers refer to functionally identical parts that APDTY 154349 replaces.
A failed power liftgate actuator rod turns a convenient feature into a daily frustration. The APDTY 154349 offers a cost-effective, brand-new replacement that restores full automatic liftgate function on 2007–2017 GM Lambda-platform crossovers. With direct bolt-in installation, OE-equivalent performance, and proven compatibility with Buick Enclave, GMC Acadia, and Saturn Outlook models, this actuator rod gets your hatch working smoothly again. Verify your vehicle fitment in the live compatibility chart, and order today to bring back the convenience of hands-free liftgate operation.