Question about 1999 Chevrolet 3500

1 Answer

Starting is a problem

The security light comes on and will not let the truck start. It will fire up and then die .

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    President:

    An expert whose answer got voted for 500 times.

  • Master
  • 1,450 Answers

YOUR IGNITION CYLINDER NEEDS TO BE REPLACED your passlock system needs to see the magnets in there turn at same time and as they get worn it thinks truck is being stolen

Posted on Oct 08, 2008

  • TripleTauto
    TripleTauto Oct 08, 2008


    1. Insure the ignition key is in the "ON" position.
    2. Record an VCM/PCM DTCs and to refer to Powertrain On-Board Diagnostic (OBD) System Check. Clear all EVO/PASSLOCK module and VCM/PCM DTCs.
    3. Momentarily rotate the ignition key to the "CRANK" position (DO NOT start the vehicle), then release it to the "RUN" position (DO NOT turn key "OFF" in the process).
    4. Wait 10 minutes. Observe the "SECURITY" indicator. Refer to the following list for the appropriate responses:



      1. If the PASSLOCK sensor was replaced the "SECURITY" indicator will flash for the 10 minutes duration.
      2. 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.
      3. 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.
      4. 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.


    1. The "SECURITY" indicator will transition from flashing to "ON" briefly to "OFF" after 10 minutes of remaining in the ignition "ON" position.
    2. Turn the ignition switch to the "OFF" position and wait for 10 seconds.
    3. 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. The new password is learned on the next ignition lock cylinder cycle from "OFF" to "CRANK" to "ON" (start attempt).

    replace passlock sensor and do this

×

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

What caused it to die?


Even in Hoosierland, this former Terre Hautian can tell you that a failing battery is a failing battery.

Nov 16, 2015 | Cars & Trucks

2 Answers

2010chevy Malibu with 4l cranks but won't start, why?


Most likely fuel system.
Verify by ether starting fluid spray in the air intake while starting.
if no fire, its ignition system.

Mar 21, 2015 | 2010 Chevrolet Malibu

1 Answer

99 chevy astro ,lost key replaced steering column. now no start. pass-lock ignition,tried key on position for ten minutes 3 consecutive times, still no start. Got fuel and fire. It actually starts for...


Yes it sounds like a security system problem. Does the new column have pass key? You are leaving the key on until the security light stops flashing? The light is flashing for 10 minutes?

Nov 01, 2010 | Chevrolet Astro Cars & Trucks

3 Answers

1992 Oldsmobile 88 Royale.... won't start, but all lights come on


Try turning the key to the on postion-not crank, just to he postion right before cranking. leave it in that postion for 15 min, Do this three and after the third time go ahead an try to start it. Hopefully this will reset your security for you.

Aug 29, 2009 | 1992 Oldsmobile 88

1 Answer

Insalled new computer,cranks but wont start


Does it start and die after 1-2 seconds or just cranks and never fires? Did it run before you installed the computer or are you trying to cure a no start problem?

Jul 12, 2009 | 1999 Chevrolet S-10 Pickup

1 Answer

Starting problem


it could be your mass airflow sensor could be dirty. clean this and your throttle body out with carb cleaner and see if that works. Other sensors that might cause this problem include the O2 sensors, or the idle control motor. If this does not fix it then the alternative would be to replace the throttle body unit.

Jun 10, 2009 | 2005 GMC Savana

Not finding what you are looking for?
1999 Chevrolet 3500 Logo

Related Topics:

317 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts

yadayada
yadayada

Level 3 Expert

61168 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21949 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6812 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...