Why won't my spare key work?
10

Asked by Guru6L35N Mar 20, 2020 at 06:51 PM about the 2003 Chevrolet Trailblazer EXT LT 4WD

Question type: Maintenance & Repair

My husband has a 2003 trailblazer that he
lost the original key for. We have a spare set
of keys for the vehicle but they won't start the
car. Any help would be appreciated!

3 Answers
157,615

James answered 4 years ago

Most likely the spare key was never programmed to the vehicle or it's not a transponder key. If you have option code BAE you must have a transponder key that's programmed to the vehicle. Unfortunately you need a working key to program additional keys yourself. Without a working key you need to be towed to your local GM Dealer for programming! Hope that helps! Jim

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