Can`t detect parking brake on

[56kz2slow]

I just installed a Pioneer Nex with a Maestro RR with the GM3 kit in my 2015 Sierra. Installation went as planned, everything works. Well almost.

There's a few features that only work when parked with the parking brake on and they don't work. The Pioneer has a light green wire in the harness that is supposed to connect to the light green wire on the GM3 harness and that`s done.

Any ideas?

[Dara DeGrand]

Have you tried engaging the parking brake, releasing it, and engaging it again? Pioneers need to see multiple pulses on the brake wire in order for you to get into the menus.