1977-1986 Buick Regal Door Lock Actuator: A Guide for Owners
If your Regal's power locks are weak, slow, or dead, a bad door lock actuator is the most common reason.
- The original actuators are secured with rivets that must be drilled out for replacement.
- New aftermarket actuators from brands like Continental and Standard Ignition are reliable and recommended over used parts.
- Before replacing the actuator, confirm you can hear the relay click when you press the lock switch to rule out an electrical issue.
- A bad door lock actuator is an inconvenience but does not prevent you from driving the car.
Symptoms of a Failing Door Lock Actuator
A door lock actuator rarely fails without warning. For your 1977-1986 Regal, watch for these signs:
- Slow or Weak Operation: The locks struggle to move up or down. They might not complete the full lock or unlock cycle.
- Unusual Noises: You may hear a buzzing, grinding, or groaning sound from inside the door when you use the power locks. This is the sound of the small electric motor straining to work.
- Intermittent Failure: Sometimes the locks work, and sometimes they don't. This can be worse in very hot or cold weather.
- Complete Failure: The lock on one or more doors does not respond at all to the power lock switch, but you can still hear a 'click' from the relay.
Choosing the Right Aftermarket Actuator
For a classic vehicle like the G-Body Regal, finding New Old Stock (NOS) GM parts is nearly impossible and very expensive. The practical choice is between a used original part from a junkyard or a new aftermarket part.
Pro Tip: Given the age of these cars, a new aftermarket actuator from a quality brand is often more reliable than a 40-year-old used part. The internal motors and plastic gears wear out over time.
Not all aftermarket parts are the same, but for this component, reputable brands offer excellent quality. They are designed to meet or exceed the original factory specifications.
- Standard Ignition (Standard Motor Products): A well-respected brand in the industry, known for electrical components. Their parts are engineered for durability and often undergo rigorous testing.
- Continental: Often a direct supplier to car manufacturers (OEM). Their aftermarket parts are built to the same high standards, ensuring a proper fit and long service life.
Both brands are considered reliable choices for your Regal, providing a cost-effective and dependable repair.
Installation Notes for the 1977-1986 Regal
IMPORTANT: The original factory door lock actuators in these G-Body cars are held in place by two large rivets, not bolts. You will need to drill these rivets out to remove the old actuator. A drill with a sharp bit or a grinder is required. The new aftermarket actuators are then installed using the nuts and bolts that typically come with the part.
The replacement process involves removing the interior door panel, peeling back the plastic weather shield, drilling out the old rivets, disconnecting the actuator from the lock rod and electrical plug, and then installing the new part.
Known Issues, Recalls, and Bulletins
There are no official recalls or Technical Service Bulletins (TSBs) from the NHTSA specifically for the door lock actuators on the 1977-1986 Buick Regal. However, there was a related recall for some 1986 models (NHTSA ID: 87V124000) concerning potential cracks in the body pillar near the door striker, which could affect door latching. This does not affect the actuator itself but is a point of interest for owners ensuring their door systems are safe.
| Part Type | Estimated Cost |
|---|---|
| New OEM | Not Available |
| New Aftermarket (Continental, Standard) | $55.79 - $69.50 |
| Used OEM (Junkyard) | $20 - $50 |
| Shop Labor (per door) | $100 - $180 |
Frequently Asked Questions
Is this a difficult job to do myself?
For a DIYer with basic tools, it's a straightforward job. The only tricky part is drilling out the factory rivets. If you are not comfortable with that, a professional mechanic can do the job in about an hour per door.
My locks click but don't move. Is it the actuator?
If you hear a clicking sound from under the dash or in the kick-panel area when you press the switch, your relay is likely working. If the lock doesn't move, the problem is almost certainly the actuator motor itself or a broken wire inside the door boot. The actuator is the most common point of failure.
Do I need to replace actuators in pairs?
No, you only need to replace the one that has failed. However, since they are the same age and have seen the same amount of use, if one fails the other may not be far behind.
Is the driver's side actuator different from the passenger's side?
Yes, the parts are typically side-specific (Left and Right). They are mirror images of each other to fit in the correct door. Ensure you order the correct side for your repair.
Technical Specifications
Aftermarket Part Example: Standard Motor Products DLA-1. The original actuators are installed with rivets; replacements use bolts.
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.