GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2003 🢒 TopKick C-Series (Crew) C4/C5 🢒 Engine 🢒 Engine Cooling 🢒 Cooling System Component Views
Figure 1:

Behind The Cooling Fan
Object Number: 1113904 Size: LF
(1)Cooling Fan Clutch
Figure 2:

Front of Vehicle
Object Number: 826867 Size: LF
(1)Chassis Harness
(2)Vacuum Pump (Diesel)
(3)Coolant Level Switch Connector
(4)Engine Harness
(5)Vacuum Pump Connector (Diesel)
(6)C106 (6 cavities - C4/C5)
(7)C106 (6 cavities - C4/C5)
Figure 3:

Top of Engine
Object Number: 822047 Size: LF
(1)Engine Chassis Harness
(2)C110 (8 cavities - L18)
(3)Engine Coolant Temperature (ECT) Sensor (L18)
(4)Engine Coolant Temperature (ECT) Sensor Connector
(5)C110 (8 cavities - L18)