Question about 1999 Chevrolet Silverado 1500

3 Answers

My security light is on and stays on. THE truck 1999 silverado starts and runs well. 300K. the headlights courtsey/dome and driver door lock are not worinking nor the key fab. I do not have a chip in the key the truck has been driven for several years without a chipped key. Some tech told to check the engine and body grounds. this happen a month ago and hit a pot hole and the system rebooted and work fine until now.

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  • missen1969 May 22, 2011

    I have disabled the door latch component do I replace the whole thing or just the switch. I
    s there a picture on the net?

  • missen1969 May 23, 2011

    No worries, I have replaced all of the actuators and switches in the door and still no change. vey stumped and stranded at this point. hope the weekend was a good time.

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  • Chevrolet Master
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Try replacing the switch, that should take care of the problem.but if still the problem persists, then further troubleshooting is required.
click this link below for more help:--- http://technoanswers.blogspot.com/2011/05/how-to-replace-door-lock-switch-on.html ------------ This should help.Thanks.Helpmech.

Posted on May 24, 2011

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  • Master
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To find out why the lights are on and why the locks don't work, you will have to start by scanning your Body Control Module (BCM) and retrieve whatever fault codes that may be set. Once the fault codes have been retrieved, I can help you with tracking down the correct system/circuits to get the thing working correctly.

Please note: This is NOT the same as hooking up an OBD code reader and reading generic OBD fault codes. This must be accessed with a code reader that can access the BCM and read "vehicle specific" codes.

Posted on May 23, 2011

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  • Master
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It sounds like the drivers door switch that tells the body control module that the door is open or closed has gone bad this switch is located inside the door latch assembly. When this switch fails to the open mode the dome lights will time out so that the battery doesn't go dead and if the switch stays open the module won't reset so that the lights will operate.The locks won't work correctly because the control module thinks the door is open same thing for the security system it thinks the doors open when its closed.

Posted on May 22, 2011

  • Jeffery Lewis
    Jeffery Lewis May 23, 2011

    You can just replace the switch , you will have to get it from the dealer i din't think it's availible after market. sorry so long getting back to you went out of town for the weekend.

  • Jeffery Lewis
    Jeffery Lewis May 24, 2011

    Yes spent time with my son thank you. When the key is in the ingnition and the drivers door is open does the truck chim to tell you the key is in the ignition switch?

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