Chevy Trailblazer Key Fob Not Working – How To Fix

By Max Anthony •  Updated: 12/19/22 •  3 min read

Chevy Trailblazer Key Fob Not Working

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Chevy Trailblazers are fitted with programmable keys that allow owners to control the locking and unlocking of their vehicles with the touch of a button on the key fob. There could be many reasons as to why your Trailblazer may not be able to control its own motor.

Dead Coin Battery

Dead battery in the key fob can cause key fob to not lock or unlock the door, which is most annoying in Trailblazer. It is possible to detect signs of weakened batteries well before they become dead. If it worked before, but its range was slowly being reduced until it stopped working, this may indicate that its battery was drained.

How to Fix

Try replacing the battery. If a button battery is not properly installed or if a battery is not suitable, it can cause serious problems for the vehicle. Change dripping batteries for new batteries that are the same size and voltage as the original batteries, and make sure the battery is facing the right direction.

Battery Connection Is Poor

The small battery that comes with the Trailblazer is secured by two metal clips that stay put and secure to the front of the device. This ensures that the circuit is completed. If any of the metal retaining clips do not hold firmly, it can result in contact issues and the remote may not be able to turn on.

How to Fix

Make certain that the batteries are centered and are tightly wrapped so that they will not sway when you shake the remote. Check whether the battery contacts are clean and if the surfaces of the battery are protected from corrosive substances.

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Water Damage

If you forget to take your key fob out of your pocket to go to the washer, it is very possible that your key fob will be damaged.

How to Fix

If the key fob stops functioning after being exposed to water from a tap or rain, completely drain the battery and clean all the electronics in the device with a paper towel. Then let it air dry completely and replace the battery.

In the event that you have exposed the chip to water that contains salt or soapy water, it is necessary to scrub the chip with isopropyl alcohol or an electrical cleaner. If your key fob still won’t turn on after all these steps, the chip in your key fob is damaged, and you will have to buy a new one.

Dead 12V Battery

The system of remote key control and keyless entry systems in Trailblazer cars requires a 12V battery to be in a good state to work correctly. When the battery in the vehicle stops functioning, or a surge in voltage occurs when corrosion of the battery terminals or the ground connection causes the electrical current to be stopped, everything on the vehicle will cease to work.

How to Fix

In that case, it is possible that you do not have access to the key that you need in order to open the door of your Trailblazer. Sometimes, the electronic accessories in your Trailblazer will not work or will not work properly; the engine will not start. It is very important that you test the 12 volt battery and all the connections that come with it.

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Max Anthony

Max is a gizmo-savvy guy, who has a tendency to get pulled into the nitty gritty details of technology and cars. He attended UT Austin, where he studied Information Science. He’s married and has three kids, one dog and a GMC truck and a Porsche 911. With a large family, he still finds time to share tips and tricks on cars, trucks and more.