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Scott K
Scott K, ASE Master Tech/Instructor
Category: Chevy
Satisfied Customers: 1569
Experience:  20 yrs Experience; GM factory Training ASE Master Certified with L1 advanced engine diagnostics
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how to get 2001 chevy impala security system unlocked after

Customer Question

when changed battery on 2001 chevy impala security system locked up nee help
Submitted: 8 years ago.
Category: Chevy
Expert:  Scott K replied 8 years ago.

Hi Shane,

Welcome to Just Answer,

Your vehicle security system can be reset in 2 different ways one is faster and requires a scan tool, and the other takes 30 minutes and doesn't require a scan tool.

Try this, step 7 states scan tool, but code will eventually reset.

30 Minute Learn Procedure

Tools Required

None

  1. Turn ON the ignition, with the engine OFF.
  2. Attempt to start the engine, then release the key to ON (vehicle will not start).
  3. Observe the SECURITY telltale, after approximately 10 minutes the telltale will turn OFF.
  4. Turn OFF the ignition, and wait 5 seconds.
  5. Repeat steps 1 through 4 two more times for a total of 3 cycles/30 minutes (the vehicle is now ready to relearn the PasslockTM Sensor Data Code and/or passwords on the next ignition switch transition from OFF to CRANK).

    Important: The vehicle learns the PasslockTM Sensor Data Code and/or password XXXXX the next ignition switch transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle.

  6. Start the engine (the vehicle has now learned the PasslockTM Sensor Data Code and/or password).
  7. With a scan tool, clear any DTCs if needed (history DTCs will self clear after 100 ignition cycles).
Scott K and 2 other Chevy Specialists are ready to help you
Customer: replied 8 years ago.
i went through the steps and it still will not start what next help ?
Expert:  Scott K replied 8 years ago.

Is the security lamp on now?

Did it come on and go off while doing the 30 min relearn?

Customer: replied 8 years ago.
yes it stays for a littlr bit then goes off lights on the interior are not working now but able to set clock and listen to radio but will not start
Expert:  Scott K replied 8 years ago.
Did the light come on and go off after the 10 min in the learn procedure?
Customer: replied 8 years ago.
i will try this tommorow monday if i can find or borrow a scan tool if this dont work what next
Expert:  Scott K replied 8 years ago.
what was the original problem why the battery was changed?