my phone won’t charge when the engine is off, so I assumed the Garmin cam would shut down which it appears it does. I’m not driving the Avalanche every day. So I replaced an old battery and the new one went dead. The only change has been adding the cam. I still need to pull out the volt meterYes, I believe both outlets are hot on my 2010. Do you have a voltmeter? it would be a quick test.
Strange that the cam would know to turn off though, perhaps it senses the voltage change?