GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2009 🢒 Sierra Denali 🢒 Diagnostic Navigation 🢒 Vehicle Diagnostic Information 🢒 Starting and Charging Schematics
Figure 1:

Starting
Object Number: 2064887 Size: FS
Figure 2:

Charging (Gas)
Object Number: 2064889 Size: FS
Figure 3:

Charging (Diesel)
Object Number: 2064891 Size: FS