Hello all I tried getting some info off the trailblazer envoy forums and well it was a complete waste of time pretty sure that forums dead so i thought I would try here. Well my issue is I installed a nice kenwood Bluetooth radio in my friends 2002 envoy sound will play for a few seconds through all speakers then stop. I made sure it wasn't the stereo by running a separate speaker directly from the head unit. What I figured is going on the factory amp turns on with the ignition but then turns off after a few seconds since the factory unit is no longer installed. My question is what is the power or data wire to the factory amp. I should be able to run the blue trigger wire from the kenwood unit to the power wire of the factory amp to trigger it. Since I'm getting sound out of it for a fee seconds when the ignition is first turned. Any information would be greatly appreciated. If no one knows I'm just gonna start testing wires to find power and just figure it out on my own. So I'm hoping to get an idea before I tear into it.