Passlock reset for 2000 Blazer - Blazer Chevrolet Cars & Trucks

This is a Passlock system. See this post on how it works, what goes wrong and how to do a reset

http://ricksfreeautorepairadvice.com/passlock-fixes/

30 Minute Procedure

1. Ensure that the battery is fully charged.
2. Use a scan tool in order to clear the Passlock?"¢ DTCs.
3. Turn the ignition switch from the OFF position to the CRANK position, and then to the RUN position.
The vehicle will start and then stall.

4. Leave the ignition ON until the security telltale turns OFF in 10 minutes.
5. Repeat Steps 3-5 for 2 more times (3 times total)
6. The Passlock?"¢ controller will learn the new data on the next start attempt.
7. Use a scan tool in order to clear all DTCs.

What code ?

The most common repair is to replace the ignition lock cylinder due to broken wires inside the steering column. Most common problems related to the Passlock family involve the Passlock sensor. The sensor is part of the ignition lock cylinder on Passlock I and Passlock II systems. ( Where the key goes ), Good-Day!

write down the vin number call the dealer they can make key for you

You will probably have to reset the passlock (security) system with the new switch/key. The aftermarket switches come with instructions to reset the passlock code.

it will not start if the passlock system says no gas or not. more wiring repairs are necessary to engage fuel pump. the door buzzer and dome light are on the same circuit

Check out this link. The passlock system is complex and tied in really well. You'll find skirt of good info on this link.
http://vatspasslockpasskeysecurityhelp.yolasite.com/

Here is a link to help you beat the passlock antitheft security light http://vatspasslockpasskeysecurityhelp.yolasite.com/

You can't turn it off, but you can buy and bypass module.

Your Passlock may need to relearn the ignition keys, if the ignition lock has gone bad like my in-laws Grand Am Gt, here is what i did so they will not get stranded any more. Buy a Passlock by pass module for around $70.00. You can orderone from GMPASSLOCK.COM in the mean time try resetting the Passlock. Good luck

Ignition keys relearn takes about 30 min to do. 30-Minute Learn Procedure
1.) Turn ON the ignition, with the engine OFF.
2.) Attempt to start the engine, then release the key to ON; the vehicle will not start.
3.) Observe the SECURITY tell tale light. After approximately 10 minutes, the light will turn OFF.
4.) Turn OFF the ignition switch, and wait 5 seconds.
5.) Repeat steps 1 through 4 - two more times - for a total of 3 cycles of 10 minutes. 3x10 = 30 minutes.
The vehicle is now ready to relearn the Passlock Sensor Data Code and/or passwords on the next ignition switch turn from OFF to CRANK Important: Turn the Ignition Switch OFF. 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.
7.) With a scan tool, clear any DTCs if needed. History DTCs will self clear after 100 ignition cycles.

Without a scan tool you may have momentary starter interruptions while history clears itself.

The black should be ground, The orange should be 12 volts, there should be another wire. Yellow? signal wire.