GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2009 🢒 Sierra - 4WD 🢒 Engine 🢒 Engine Cooling 🢒 Engine Cooling Schematics
Figure 1:

Gas (Except HP2)
Object Number: 2064883 Size: FS
Figure 2:

Gas (HP2)
Object Number: 2161789 Size: FS
Figure 3:

Diesel
Object Number: 2064885 Size: FS