BlownH2

Hey guys, im having an issue with my 03 hummer aftermarket stereo. I currently am using a pioneer avh-201ex headunit, and a pac rp5-gm11 interface. Stock amp, and stock speakers. I had to remove the radio and unplug my interface to replace my yaw rate sensor, got everything back together, started the truck and the radio would turn on for about 3 seconds and then the screen would go black. The unit would turn completely off. Tried hitting the on/off button, no dice, checked the fuses, everything checked out, looked for grounding issues, none, and no loose connections, so i unplugged the interface and plugged it back in, the radio again turned on and then right back off. Im at a loss, and about ready to spend another 120 bucks on a new interface kit. Has any other gm guys have this issue? Or any pointers?

Thetiderolls365

Check the harness for accessory when the radio is acting up. We run into this issue with the PAC harnesses, they lose the RAP circuit in the interface. If you run your own ignition to the Brown or orange under the steering column, i can almost guarantee your problems will go away.