Question about 2007 Chevrolet Tahoe
It's the passlock system that is acting up.. I have the same problem at the moment but mines came from disconnecting my stereo system, the power wire sparked and toasted one of the computers. now the important thing is if the security light is flashing or is steady on.. if it is flashing you just have ti reset the security by turning the key to the on posistiona and wait about 10 - 15minutes and let the pass lock reset.. is it is steady on (no flashin):
a steady light means that you could have a Class 2 data circuit problem. It indicates that your "passward" from your key in the "passlock" is not getting sent to the (Vehicles Thieft Deterrent) thats inside your Vehicles Control Module. This shuts down your fuel log or injectors stopping the engine from starting. The vehicle might start, but then stalls after 4 sec or so.
It's like the vehicle thinks it's been stollen. That's too bad, if your light was flashing "and" your cycles were correct the car would have re-leaned the passward and started.
A problem could mean...but not limited to a open,shorted or grounded circuit....or a loose or open connector between these comunicating systems: SIP/PCM/VTD/VCM and perhaps the EBCM.
Security Insturment Panal
PCM - Passlock Control Module
VTD - Vehicle Theift Deterrent
VCM- Vehicle Control Module
EBCM - E Brake Control Module
you may have to have the dealer check and replace / but instead of passlock system you may have the Passkey 3+ system
Posted on Mar 07, 2009
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