Security Light on 2000 Silverado

Discussion in 'General Chevy & GM Tech Questions' started by thehunt, Apr 20, 2010.

  1. thehunt

    thehunt New Member

    I have a 2000 silverado 4x4, the security light is always on even while driving. No problems with starting. The fuel gage is also erratic at times. Any thoughts
  2. colorado_kool-aid

    colorado_kool-aid New Member

    My truck security light used to do the same thing "just stay on". but not long after it wouldn't start once and a while. chevys our years have problems with the "passlock system". I guess the truck thinks its getting stolen, so it shuts down the power to the injectors.

    p.s. keep an eye on fuel prussure. pumps have problems too!

    Good ol' Government Motors!!!
  3. murdog94

    murdog94 Epic Member 5+ Years 5000 Posts

    The fuel guage is related to the fuel pump module. GM installed the modules and didnt insulate the connectors from the corrosion of Gasoline.. Eventually you will completely lose your gas guage, and possibly your fuel pump shortly after that...
  4. ChevyFan

    ChevyFan The Sheriff Staff Member 5+ Years 1000 Posts

    Is there any solution or best practice for the Security Light issue as related to passlock?
  5. silverado002

    silverado002 Rockstar 3 Years 1000 Posts

    Did you check for DTC codes? Sometimes the security light acts as a failure indicator.

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