Question about 1998 GMC Envoy

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I am having a problem that just started, My security light stays on and is flashing if I leave my key in the on position after about 10 minutes it will start but then when I shut it off it won't start again until I leave the key in the on position for at least 10 minutes Could you let me know what this could be Please

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Darryl Kazemba

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Hello: The best to do is have the system checked with a scanner to get the code but most likely you have a pass-lock system problem. The whole lock cylinder will have to be replaced along with a new key.

Posted on Jul 22, 2011


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My neighbor changed the steering wheel on a 2001 suburban and now security light is on. Now the truck starts then dies. I need a passlock diagram

Sounds like you need to do a 30 minute security relearn. Basically turn the key to the run position, do not start. Leave it in the run position for approximately 10 minutes. The flashing security light will go out. Turn the key off for 5 seconds. Turn it back to the run position for another 10 minutes. Again the light will stop flashing. Tune the key off and repeat one more time. When the light stops flashing turn the key of and then start the vehicle.

There are also plenty of references to this online as well. Good luck.

I’m happy to assist further over the phone at

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