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

Lower Front of the Vehicle


Object Number: 901392  Size: LF
(1)Variable Effort Steering Actuator
(2)Variable Effort Steering Actuator Connector
Figure 2:

Lower Center of Steering Column


Object Number: 1358211  Size: LF
(1)Steering Wheel Position Sensor