Radio Power
WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
The main radio power is supplied by a 15A fuse located in the underhood fuse block. The radio does not require a discrete ignition feed circuit for power moding. The power moding is accomplished using a structure of Virtual Networks (VN). The Power Mode Master (PMM) transmits the GMLAN power mode signals.
The radio supports the following signals:
- System Power Mode
- Infotainment Operation Allowed
The radio also supports the following GMLAN Vehicle Power Modes:
- OFF
- ACCESSORY
- RUN
- CRANK REQUEST