Question about 2000 GMC Sierra

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2000 GMC Sometimes starts but shuts down right away. If I wait 15 minutes it will start and run.Sometimes the security lite stays on, anything to do with the starting problem

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Yes the security light has a lot to do with the vehicle starting and shutting off.This means the Body Control module is not getting the correct signal from the key itself or the ignition cylinder is not reading it correctly.What you can try,and this is something simple is if you have another key use it and see if it makes a difference.Sometimes a worn out key will do this.If this makes no difference then you will need to get the codes from the Body Control module.Usually a B2960 will come up.There is a service bulletin for this.It is number 01-08-56-002A.Has to do with checking wires and connections.Using an ohm meter for checking resistance in the wiring.Also using a scan tool for looking at the data.Let me know if you have anymore questions.Good luck.

Posted on Mar 12, 2011

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