How do I reset passlock on 2005 chevy Trailblazer?

5

Asked by Jul 11, 2013 at 06:46 AM about the 2005 Chevrolet TrailBlazer LS

Question type: Maintenance & Repair

Battery died Tuesday evening.Put in new battery the next day.Now have power to everything except it will not start. Passlock will flash 3 times then stay on when I turn the switch.Is there any way I can reset the passlock without towing to garage for repair?

11 Answers

This may work: 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). look at 'security light', after approximately 10 minutes it should shut 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 Passlock Sensor Data Code The vehicle learns the Passlock Sensor Data Code and/or password on 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 Passlock Sensor Data Code and/or password).

29 of 29 people found this helpful.
570

I have a 2002 chevy trailblazer and the passlock is locked how can i restart my truck ! please help!

40 of 40 people found this helpful.
570

i tried your password sensor data code command with the steps 1-4 than repeated 3 x than did the off to crank thing but not working ?

17 of 17 people found this helpful.
60

i just did it on my 2003 trailblazer and it did work . the steps that davidh25 said to do follow it exactly what he said to do

6 of 6 people found this helpful.
110

I just did my truck wont start

11 of 11 people found this helpful.

DavidH25 wen i do the steps does first time count as 1cycle? An do i repeat the steps every 30 minutes?

4 of 4 people found this helpful.

I did it on my 04 trailblazer an it work...

4 of 4 people found this helpful.
10

I did it to my 04 trailblazer and won't do it either

1 of 1 people found this helpful.
170

We have a 2005 trailblazer. It sat idle for 2 years. Changed battery and numerous other items. Trailblazer runs, BUT the security light and hazards stay on....will doing this "passcode" thing fix?

17 of 17 people found this helpful.
10

I did it for my 2003 trail blazer, I put an used ecm from a 2002 vehicle and works perfect

1 of 1 people found this helpful.

i got a 2003 trailblazer . when I was working on it the ele shut down I thout it was the battery so put new one in . know when I turn the key I don't get enty light but the service light . I tried turning the switch on for 10 minutes but not getting sercurety light

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