Anti theft deterrent reset?

Tiny
KYNDRA MEADOWS
  • MEMBER
  • 2015 CHEVROLET SILVERADO
  • 6.0L
  • 4WD
  • AUTOMATIC
  • 150,000 MILES
How to reset the anti theft deterrent so the truck will start?
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Thursday, March 5th, 2020 AT 8:06 PM

35 Replies

Tiny
MOTOR MASTER
  • EXPERT
Hello my name is Dave.

Here is a link to our tutorial on resetting a security system, hope it helps and thank you for using 2CarPros!

https://www.2carpros.com/articles/how-to-reset-a-security-system
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Friday, March 6th, 2020 AT 4:00 AM
Tiny
KYNDRA MEADOWS
  • MEMBER
Thanks the guide worked for me!
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Friday, July 24th, 2020 AT 11:33 AM
Tiny
MARK BIRTCHER
  • MEMBER
  • 2009 CHEVROLET SILVERADO
  • 0.6L
  • V8
  • 4WD
  • 200,000 MILES
Vehicle was stolen with key. It was recovered with no key and ignition lock busted. I can turn it with screwdriver but won't turn over. I need to know if it runs before spending money on ignition. Is there anything I can do to bypass security? Please help.
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Friday, July 24th, 2020 AT 11:34 AM (Merged)
Tiny
KASEKENNY1
  • EXPERT
Hi,

Unfortunately, there is no way to bypass the ignition system and security. This system was designed to prevent this exact thing. The only way they could steal it is with the key. So punching the ignition probably came later and is most likely the reason the vehicle was abandoned and then recovered (assuming that is how it was recovered).

More than likely it will run once the ignition system is restored assuming they didn't remove any other components. However, if you are not comfortable inspecting the vehicle closely, I would just take it to someone to look it over and see if anything obvious is missing and the replace the ignition and program new keys if it all checks out.

Thank you for using 2CarPros.
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Friday, July 24th, 2020 AT 11:34 AM (Merged)
Tiny
MARK BIRTCHER
  • MEMBER
Okay. I have checked it pretty good. I've crawled all over it and ignition problem is all I see. Thanks for your time.
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Friday, July 24th, 2020 AT 11:34 AM (Merged)
Tiny
KASEKENNY1
  • EXPERT
Okay. Yeah, fortunately these guys that steal these things don't try to conceal parts they removed so if you didn't see anything then you are okay.

Let me know if you need anything else. Thanks for using 2CarPros.
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Friday, July 24th, 2020 AT 11:34 AM (Merged)
Tiny
SPECTOR37
  • MEMBER
  • 2004 CHEVROLET SILVERADO
  • 121,768 MILES
The battery in my 2004 Chevy Silverado died yesterday and before that it would start and run fine. Now the problem is I charged the battery and tried to start it it will turn over like normal and start for about a second and die. Now the question I have is does the passlock system need to relearn the codes again before it will start?And will the battery going dead cause the problem?
Thanks
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Friday, July 24th, 2020 AT 11:34 AM (Merged)
Tiny
WRENCHER1
  • MEMBER
If you are getting any kind of security system indicator, here is the relearn procedure.

Disconnect the battery and hold the cables together for about 30 seconds then reconnect the cables before performing the procedure.Read it carefully if done incorrectly it won't work.If it helps let me know.
Turn ON the ignition, with the engine OFF.

Attempt to start the engine, then release the key to ON (vehicle will not start).
Observe the SECURITY telltale, after approximately 10 minutes the telltale will turn OFF.
Turn OFF the ignition, and wait 5 seconds.
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 and/or passwords on the next ignition switch transition from OFF to CRANK).
Important

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.
Start the engine (the vehicle has now learned the Passlock Sensor Data Code and/or password).

With a scan tool, clear any DTCs if needed (history DTCs will self clear after 100 ignition cycles).

This guide can help as well

https://www.2carpros.com/articles/how-to-reset-a-security-system

Please let us know if you need anything else to get the problem fixed.
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Friday, July 24th, 2020 AT 11:34 AM (Merged)
Tiny
RRACERGUY717
  • MEMBER
  • 2004 CHEVROLET SILVERADO
V8 Two Wheel Drive Automatic 115K miles

My truck will start and shut off when I release the key. The door locks wont work all of a sudden on either side, dome light not working. Radio displays time but wont work. Seems like the theft system is not releasing for some reason I was thinking it has a bad door lock module can someone point me in the right direction Thanks Bob.G
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Friday, July 24th, 2020 AT 11:34 AM (Merged)
Tiny
SERVICE WRITER
  • EXPERT
Yes you are on the right track their is a driver door lock module that goes out all the time here is the location and the instructions on how to program it

PROGRAMMING THEFT DETERRENT SYSTEM COMPONENTS

PROGRAMMING REPLACEMENT PASSLOCK SENSOR, BCM, OR PCM

IMPORTANT:
The body control module (BCM) must be programmed with the proper RPO configurations before performing learn procedures. See Body Control Module (BCM) Programming/RPO Configuration.
If replacing the BCM with a GM Service Parts Operations (SPO) replacement part, the module will learn Passlock sensor data code immediately. The existing PCM, however, must learn the new fuel continue password when the BCM is replaced.
If replacing a powertrain control module (PCM) with a GM Service Parts Operations (SPO) replacement part, after programming, these modules will learn the incoming fuel continue password immediately upon receipt of a password message. Once a password message is received, and a password is learned, a learn procedure must be performed to change this password again. A PCM which has been previously installed in another vehicle will have learned the other vehicle's fuel continue password and will require a learn procedure after programming to learn the current vehicles password.
CONDITIONS
Use this procedure after replacing:
Passlock Sensor
BCM
PCM
LEARN PROCEDURES
There are 2 available methods to perform the programming procedure:
A 10 minute procedure which requires a Tech 2 and a techline terminal.
A 30 minute procedure which does not require the use of any tools.
10 MINUTE LEARN PROCEDURE

TOOLS REQUIRED
Tech 2
Techline terminal with current Service Programming System (SPS) software
Connect the Tech 2 to the vehicle.
Select "Request Information" under "Service Programming".
Disconnect the Tech 2 from the vehicle and connect it to a techline terminal.
On the techline terminal, select "Theft Module Re-Learn" under "Service Programming".
Disconnect the Tech 2 from the techline terminal and connect it to the vehicle.
Turn ON the ignition, with the engine OFF.
Select "Program ECU" under "Service Programming".
Attempt to start the engine, then release the key to ON, vehicle will not start.
Observe the SECURITY telltale, after approximately 10 minutes the telltale will turn OFF; the vehicle is now ready to relearn the Passlock Sensor Data Code and/or password on the next ignition switch transition from OFF to CRANK.
Turn OFF the ignition, and wait 5 seconds.
Start the engine; the vehicle has now learned the password.
With the Tech 2 scan tool, clear any DTCs.
30 MINUTE LEARN PROCEDURE
Turn ON the ignition, with the engine OFF.
Attempt to start the engine, then release the key to ON; the vehicle will not start.
Observe the SECURITY telltale; after approximately 10 minutes the telltale will turn OFF.
Turn OFF the ignition, and wait 5 seconds.
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 and/or passwords on the next ignition switch transition from OFF to CRANK.
IMPORTANT: 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.

Start the engine. The vehicle has now learned the Passlock Sensor Data Code and/or password.
With a scan tool, clear any DTCs, if needed. History DTCs will self clear after 100 ignition cycles.

Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.

Cheers, Ken
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Friday, July 24th, 2020 AT 11:34 AM (Merged)
Tiny
RRACERGUY717
  • MEMBER
There NO lights flashing I will try the relearn process and see what happens Ill let you know thanks Bob
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Friday, July 24th, 2020 AT 11:35 AM (Merged)
Tiny
SERVICE WRITER
  • EXPERT
Well, I'm not sure if the no start and the other issues are related. If they are, I would be leaning to wires (not ignition) shorting out or a body control module issue.

Let's treat them separate at this point and go after the most important one.

Regarding the no start:

Have you checked for any codes in the pcm yet?
Check fuel pressure..(I assume a 5.3 liter). Critical that it is right in spec.
There have been issues with e-85 fuel. Spray some carb cleaner in to the throttle body and see if you can run it off the carb cleaner for a few moments.
Check for presence of spark.

Check under the driver's seat for chafed wiring:


https://www.2carpros.com/forum/automotive_pictures/30961_xsil_1.jpg



What did you find out?
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Friday, July 24th, 2020 AT 11:35 AM (Merged)
Tiny
RRACERGUY717
  • MEMBER
Its been a while but I havnt had time to work on truck until now.

!) When cranking the truck will start but then shuts off like its not getting fuel.
2) try to pull codes and it wont communicate
3)I bought a new BCM had it coded correctly still same problem as above
4) looked under seat dont see any bare wring problems.

LMK what you think to check next thanks Bob.G
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Friday, July 24th, 2020 AT 11:35 AM (Merged)
Tiny
SERVICE WRITER
  • EXPERT
We need to get communication back. Check for a blown fuse for the DLC. IF it is, replace it and recheck for communication.
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Friday, July 24th, 2020 AT 11:35 AM (Merged)
Tiny
RRACERGUY717
  • MEMBER
FYI and others it was a bad PCM.

Got water up into wiring harness/main connector at PCM and shorted out PCM. Installed used PCM and That problem was solved.
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Friday, July 24th, 2020 AT 11:35 AM (Merged)
Tiny
HALL058505
  • MEMBER
  • 2004 CHEVROLET SILVERADO
2004 Chevy Silverado

the alarm went off and they got it to quit but now it wont start what do I do now?
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Friday, July 24th, 2020 AT 11:35 AM (Merged)
Tiny
JACOBANDNICKOLAS
  • EXPERT
Is the security light staying on?

Let me know.
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Friday, July 24th, 2020 AT 11:36 AM (Merged)
Tiny
TMCBRIDE
  • MEMBER
  • 2003 CHEVROLET SILVERADO
  • V8
  • 2WD
  • AUTOMATIC
  • 90,000 MILES
Yes I have a 2003 Silverado that has been parked for about a week. WhenI parked it everything was working fine. I went and startedit up the first thing I noticed that the keyless entry option did not work at all. The next thing I noticed that the right side door nothing worked. The mirror, the door locks, the power windows do not work. I have tried all the fuses but I cannot find the relays that are supposed to be on the fuse block. The left door works fine. Another thing I noticed this morning is that it seems to be idling a bit low. I would appreciate your helpful suggestions. Thanks travis
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Friday, July 24th, 2020 AT 11:36 AM (Merged)
Tiny
BENAGGIE
  • MEMBER
I have the exact same problem. It just happened. My keyless entry will not work and my right side door has no power. Were you able to find a solution?
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Friday, July 24th, 2020 AT 11:36 AM (Merged)
Tiny
WILHARRIS
  • MEMBER
  • 2002 CHEVROLET SILVERADO
  • 6.6L
  • V8
  • 2WD
  • AUTOMATIC
  • 125,500 MILES
Today the security bell began when the engine was turned off. It would not stop until the engine was started again. I checked that all doors were completely closed, the lights were off and there was not unknown body damage.
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Friday, July 24th, 2020 AT 11:36 AM (Merged)

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