Quote:
Originally Posted by mtaman02
...In specific the Ignition Circuit on the radio side. I know where it is on my '00 Blazer but can't find it on the radio and I know there has to be one...
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There most likely isn't one. The recent GM radio I'm working with right now only has a single power pin, connected to the battery (through a fuse, of course). It finds out whether the ignition is on by listening to messages on a serial data bus.