Have a question for folks with D3 installed.

Power doesn't go to the radio until I turn the ignition key to position 2, the first being acc. Also when I shut down the truck the radio turn right off instead of staying on for ten minutes?

Was just reading through instructions for the GMAH24B I installed and it says it retains RAP so I'm just wondering if the "bypass" some how removes this feature.

Truck is a 04 GMC 2500HD Bose/Onstar

No, the bypass doesn't effect the powering on/off of the unit in any way. My guess is the ACC wire isn't hooked up to the right wire, or you need an interface/adapter of some sort.

righto, didn't think it would effect it. Installer did it so I'll have a look myself.

I hate letting others touch my truck.