Buick LeSabre Trunk Lock and Actuator Guide (1992-1999)
Everything you need to know about fixing the trunk lock on your 1992-1999 Buick LeSabre.
- The most common failure is the electric trunk lock actuator, which stops the remote release button from working.
- Before replacing parts, check the valet lockout switch on the trunk latch itself.
- Replacing the actuator is an easy DIY job that takes less than an hour.
- ACDelco and Standard Ignition are high-quality aftermarket choices for this part.
Is Your Buick LeSabre Trunk Stuck?
A common problem on the 1992-1999 Buick LeSabre is a failed trunk lock actuator. This is the small electric motor that unlatches your trunk. Over time, the motor simply wears out. You might hear a clicking sound from the trunk when you press the release button, or you might hear nothing at all. In other cases, the physical lock cylinder where you insert the key can seize up from age and lack of use, meaning the key won't turn.
Check This First: The Valet Switch
Before you buy a new part, check the valet lockout switch. It is a small switch located on the trunk latch assembly itself. If this switch is accidentally flipped, it will disable the electronic trunk release button. Try flipping this switch and see if your trunk release starts working again.
🎬 Watch: How to troubleshoot and fix a stuck trunk latchChoosing the Right Aftermarket Trunk Lock
For a vehicle like the 1992-1999 LeSabre, using a new aftermarket part is a smart and affordable choice. The original GM parts can be expensive or hard to find. Aftermarket brands offer good quality for a much lower price. Here’s a look at the brands available.
Brand Quality Tiers
- Premium Aftermarket (ACDelco, Standard Ignition): ACDelco is GM's official parts brand, and their parts are considered to be of original equipment (OE) quality. Standard Ignition (also known as SMP) is another top-tier brand trusted by professional mechanics for its quality and reliability, often meeting or exceeding OE standards. For this part, either of these brands will provide a durable, long-lasting repair.
- Value-Priced (Replacement): The "Replacement" brand offers a functional part at the lowest price. It's a good option if your budget is the main concern. While it will get the job done, it may not have the same long-term durability or perfect finish as the premium brands.
Cost of New Aftermarket Trunk Locks (1992-1999 LeSabre)
| Brand Tier | Part Cost |
|---|---|
| Premium (ACDelco, Standard Ignition) | $20 - $27 |
| Value (Replacement) | $14 - $20 |
Note: Prices are estimates and can change.
Pro Tip: Use The Lock
After you replace your trunk actuator, make it a habit to use your physical key in the trunk lock once every few months. This keeps the lock cylinder from seizing up from lack of use, ensuring you always have a backup way to get into your trunk.
Frequently Asked Questions
Why did my trunk release button suddenly stop working?
The most common reason is a failed trunk lock actuator motor. It's a small electric motor that wears out over time. First, check that the valet switch on the latch isn't activated. If the switch is fine, and you don't hear any sound when you press the button, the actuator is the likely culprit.
Is it difficult to replace the trunk lock actuator myself?
No, this is a good job for a DIY mechanic. It usually involves removing the trunk liner, unplugging the electrical connector, and removing two or three bolts (often 10mm). The entire job can typically be done in under an hour with basic hand tools.
🎬 See this walkthrough on how to replace the actuatorMy key won't turn in the trunk lock. Is that the same problem?
No, that is a separate issue with the mechanical lock cylinder itself. The cylinder can get corroded or seize internally. Sometimes a locksmith can repair it, but often the entire lock cylinder needs to be replaced. This is a different part from the electric actuator.
🎬 Watch: A mechanic's look at Buick trunk and door locksAre there any recalls on the 1992-1999 LeSabre trunk lock?
No, there are no specific recalls from the NHTSA for the trunk lock or actuator on this vehicle.
Helpful Videos
Technical Specifications
OEM Part Numbers: 25664288 16640848
Fits 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999 Buick LeSabre. Part is the electric actuator motor for the deck lid latch release.
We Have This Part in Stock
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.
- Buick LeSabre: