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

Automatic Transmission Electronic Component Locations


Object Number: 831861  Size: LF
(1)Park/Neutral Position Switch Assembly (39)
(2)Automatic Transmission Input and Output Speed Sensor Assembly (74)
(3)TCC Pressure Control Solenoid Valve
(4)TCC Enable Solenoid Valve
(5)Ratio Control Motor
(6)Line Pressure Control Solenoid Valve
(7)Transmission Fluid Pressure Sensor
(8)Module Leadframe
Figure 2:

Right Front Engine Compartment - LY7


Object Number: 1847773  Size: LF
(1)Throttle Actuator Control (TAC) Module
(2)Electronic Brake Control Module (EBCM)
(3)Transmission Control Module (TCM)
(4)Engine Control Module (ECM)