Question about 2006 GMC Yukon Denali

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The veh won't start. The dash shows a picture of

The veh won't start. The dash shows a picture of the vehicle with a lock on it.

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Your passkey security system has been activated, try this reset procedure with the original key for the truck

PASSKEY LOCKOUT RESET GM CARS 1999 UP
1) Put the key in the ignition and turn to the "ON" position. Leave it that way for 10 minutes. After 10 minutes turn the key and take it out. Repeat this process (2) more times (3 times, 30 minutes total) This should reset the passlock system to recognize your key.

Posted on Sep 07, 2009

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Posted on Jan 02, 2017

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1 Answer

CANNOT GET VEH STARTED DUE TO SECURITY LOCK FEATURE...IS THERE ANYWAY TO FIX WITHOUT BEING TOWED OR REPAIRED...VEH UNABLE TO START


If it is an aftermarket alarm you can unplug the brain which is a little black box with a few plugs on it usually under the driver side dash near the steering column.

hope this helps,
-david

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The security light is the factory alarm. Does this come on while driving?

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