:cheers: My 2000 Silverado Z71 start but dies after 1 second , security light is blinking.Try the remote also waited 10 minutes with the ignition on. Still won't start? Someone please help

The Theft Deterent system has detected a problem and set a code in the PCM and BCM.
Unfortunatly, it thinks you are trying to steal it.
Do you have a remote starter installed?
First thing is to retrieve the codes..that will determine what diagnostics need to be done next.

:cheers: My 2000 Silverado Z71 start but dies after 1 second , security light is blinking.Try the remote also waited 10 minutes with the ignition on. Still won't start? Someone please help

This problem is starting to surface with GM vehicles. I just worked on a '00 Silverado on Friday with simular problems. I installed a remote starter for them so I changed out the module to see if it will be OK. I doubt it though.

:eek7: thanks you GMMERLIN ? where should i start first. change my remote or my computer.

:eek7: thanks you GMMERLIN ? where should i start first. change my remote or my computer.
You need to first test things out first instead of shooting in the dark. You need to know what to fix. Otherwise, it can be very $$$.