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To reprogram a key for a 2003 Oldsmobile Alero, you'll need to have at least one functioning key. Insert the working key into the ignition and turn it to the "On" position without starting the engine, then turn it back to "Off." Repeat this process for a total of five times, ending with the key in the "On" position. After the fifth time, the security light will flash, indicating that the car is in programming mode; insert the new key and turn it to the "On" position for about 10 minutes to complete the programming.

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1mo ago

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