Security Issues

[mike_k28]

I have a 2001 gmc sierra 1500. I recently was trying to fix a short in my signal light lever, so i unplugged wireing in the colum, and apparently the security in the truck kicked in. It will start but shut off right away. the dash light security light stays on. I tried the 10 min thing, that doesnt work. Is there anyway to get passed it without taking it in. If I have to take it in does anyone know how long it takes, because im getting the run around from the dealer and other places.

 

Thanks so much.

[DTyrrell]

Try leaving it for an hour. I had this happen to my work van (2006 Uplander) when we changed the battery. Left it at the garage for a few hours and came back and the mechanic said he left it for 30-60 minutes and it started.

[redvett]

Try th3 correct way.

The following procedure allows for anyone to reprogram the EVO/Passlock™ module learned data code with any tools, other than the scan tool, when any of the following parts are replaced:

 

- The EVO/Passlock™ module

- The passlock™ sensor

- The VCM/PCM

 

 

 

The following is the Auto Learn Procedure:

 

1) Insure the ignition key is in the ON position.

 

2) Clear all EVO/passlock™ module and VCM/PCM DTCs. Record and refer any VCM/PCM DTCs to:

- For 5.0/5.7L engines, refer to Powertrain On Board Diagnostic (OBD) System Check in Engine Controls - 5.0/5.7L

 

3) Momentarily rotate the ignition key to the CRANK position (Do NOT start the vehicle), then release it to the RUN position (Do NOT key OFF in the process).

 

4) Wait 10 minutes. Observe the SECURITY indicator. Refer to the following list for the appropriate responses:

- If the passlock™ sensor was replaced the SECURITY indicator will flash for the 10 minutes duration.

- If the EVO/passlock™ module was replaced, the SECURITY indicator will flash for a few seconds and then remain ON for the remainder of the 10 minutes duration.

- If the VCM/PCM was replaced with a new programmed VCM/PCM and connected to the vehicle for the first time, the vehicle will start and this procedure may not be necessary.

- If the replacement VCM/PCM was connected to any vehicle at any other time, even momentarily, the SECURITY indicator will flash for a few seconds and then remain ON for the 10 minutes duration.

 

5) The SECURITY indicator will transition from flashing to ON briefly to OFF after 10 minutes if remaining in the ignition ON position.

 

6) Turn the ignition switch to the OFF position and wait for 10 seconds.

Repeat steps 3-6 two more times. The new security code is ready to be communicated among the Passlock sensor, EVO/Passlock module and VCM/PCM.

 

7) The new password is learned on the next ignition lock cylinder cycle from OFF to CRANK to ON (start attempt).

[MYZ-71]

just replace the 20amp TBC fuse in underhood compartment and she`ll start right up.

[mike_k28]

just replace the 20amp TBC fuse in underhood compartment and she`ll start right up.

 

 

have you had this problem before are you sure that'll fix it?

 

thanks, mike

[BlackZ71Silverado]

I had this happen to my 2001 Silverado. I unhooked the battery and let it sit for a while, she started right up. All I had to do was unlock the radio after that and all was good.

[MYZ-71]

just replace the 20amp TBC fuse in underhood compartment and she`ll start right up.

 

 

have you had this problem before are you sure that'll fix it?

 

thanks, mike

 

 

had the exact same thing happen to me a while back, almost went crazy, tried battery disconnect and other procedures, finally got fed up and pulled fuse by fuse, the last one I pulled was the TBC 20 amp and it was blown, replaced and she started right up.