Engine on without key?????

[MiNdHaBiTs]

i turned off my 2005 Tahoe with my key last night and the engine was still running. I had to disconnect the battery and alternator to get it to turn off. Today same problem but i was able to disconnect the PCM fuse to get it to turn off.

any ideas of what to do?

 

[Yuke2K]

Wow man, thats scary. I'd say take it to the stealership and have them run an electrical diagnostic...sounds like you've got a short somewhere in the ignition.