Question about 2004 Chevrolet TrailBlazer

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My key does not unlock my door anymore. I can only unlock my vehicle with the remote. I'm afraid I won't be able to get into my vehicle if I misplace my remote! Any suggestions? The headlight went out on my vehicle, what is the light bulb number I need to replace it?

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As for the door lock, try spraying a little white lithium grease in the key hole and insert your key and rapidly move in and out to get the tumblers loose again and get it working. now, as for the head light, just go to your local parts store and they will gladly help you get the right bulb for you and can even help you replace it if needed.

Posted on Jul 12, 2010

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Posted on Jan 02, 2017

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Keys won,t lock or unlock doors


Use this Procedure for Buick Vehicles "With" Driver Information Center Buttons.

This information is in your "Owners Manual" in the "Drivers Information Center Section."

1. Insert Key and turn to ON position so you can access Driver Information Center.

2. Press the vehicle information button until PRESS TO RELEARN REMOTE KEY displays.

3. Press the set/reset button until REMOTE KEY LEARNING ACTIVE displays.

4. Press and hold the lock and unlock buttons on the key-less remote at the same
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5. To program additional remotes at this time repeat step 4. This vehicle can have a maximum of eight remotes programmed.

6. To exit programming mode turn key off and remove key. Test remote(s).


Use this Procedure for Buick Vehicles "Without" Drivers Information Center Buttons.

To access this display, the vehicle must be in Park (P) with key in the on position (as far as you can go without cranking engine).

1. Press the trip odometer reset stem until RELEARN REMOTE KEY displays.

2. Press and hold the trip odometer reset stem for three seconds. The message REMOTE KEY LEARNING ACTIVE will display

3. Press and hold the lock and unlock buttons on the first key-less remote at the same
time for approximately 15 seconds. A chime will sound indicating that the remote is
programmed.

4. To program additional remotes at this time repeat step 3. This vehicle can have a maximum of eight remotes programmed.

5. To exit programming mode turn key off and remove key. Test remote(s).

Good Luck !

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