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

Front of the Engine Compartment, Behind the Radiator


Object Number: 525003  Size: LF
(1)Cooling Fan - Left
(2)Cooling Fan - Right
Figure 2:

AIR Relay


Object Number: 736519  Size: SH
(1)Secondary Air Injection (AIR) Pump Relay
(2)Coolant Level Switch (in Coolant Surge Tank)