Question about 2004 Chevrolet Impala
Good Evening, this is a common ocurrence with the gm ignition switches. What you need to do is try and start the car then leave the key in the forward position for 11-15 mins then shut it off and do it again 2 more times and that should recode the system. I hope this helps and if you have any more questions please feel free to ask.
Posted on Aug 29, 2010
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Posted on Jan 02, 2017
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The CTD system requests the IPC to illuminate the indicator only when the ignition switch is OFF. The CTD system uses the indicator in order to identify system status. For specific CTD condition that will illuminate the security indicator, refer to Content Theft Deterrent (CTD) Description and Operation .
The IPC performs the displays test at the start of each ignition cycle. The indicator illuminates for approximately 3 seconds.
SERVICE THEFT SYSTEM The radio illuminates the SERVICE THEFT SYSTEM message when the VTD system detects a failure. The radio receives a message from the theft deterrent control module via the serial data circuit requesting illumination.
This is one you need to take to the dealer , unless you have a GM factory scan tool !
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