Skip the auto shop - Our mechanics make house calls

Q: Door locks don’t work, don’t all lock consistently

asked by on

The door locks on my 2008 Chevrolet Malibu are absolutely useless! I'm afraid to leave anything valuable in the car because they will lock and unlock on their own. Sometimes they pop up, lock, and then pop back up again. It's a big problem for a car with only 70,000 miles on it! What is causing all of this?

A: Erratic door operations such as locking or ...

Erratic door operations such as locking or un-locking on their own is a common complaint for GM vehicles. The culprit is most likely the lock actuators in each door. The locking system in your car uses a Body Control Module (BCM) to complete a circuit, which controls the ground for the door lock actuators in each door and the trunk. YourMechanic can test the system, clean the connectors to the BCM and check for corrosion. The actuators are prone to a high failure rate and applying dielectric grease in the terminals when replacing can help keep out any damaging water or moisture in the connectors.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Service Brake System Light beeps on for a minute then turns off

There is a problem with your brakes or the ABS that is turning this light on. A code reader should tell you what specifically is the problem. Most likely, a wheel speed sensor is dirty or has failed. This is...

Q: Door won't open from inside or outside(Driver side)

Hello. Thank you for writing in. Unfortunately at this point you were going to have to attempt to take the door panel off with the door closed. The alternative is to try and remove the handle on the outside, which...

Q: every few days i have to jump start my car

Hello. Yes a bad starter could cause a car to need a jump start every few days. Additional power provided by an extra battery could be enough to get a weakening started going again. Your vehicle may have a battery...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.