GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2007 🢒 Sierra - 4WD 🢒 Engine 🢒 Engine Cooling 🢒 Engine Cooling Schematics
Figure 1:

Gas
Object Number: 1845254 Size: FS
Master Electrical Component List
Cooling Fan Description and Operation (w/o LFA)
Control Module References
Diesel
B+ Bus - 2 of 3
B+ Bus - 2 of 3
G100
G101
Figure 2:

Diesel
Object Number: 1870482 Size: FS
Master Electrical Component List
Cooling System Description and Operation
Control Module References
Gas
Low Speed Bus - 1 of 3
G106 (4.3L) and G103