GM Service Manual Online
For 1990-2009 cars only
Figure 1:

Engine Cooling Fan Harness Routing View


Object Number: 588000  Size: LF
(1)C105 (Inline from Engine to Engine Cooling Fans Jumper)
(2)RH Engine Cooling Fan
(3)LH Engine Cooling Fan
Figure 2:

Left Side of Engine Radiator


Object Number: 587997  Size: LF
(1)Engine Coolant Level Indicator Module