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

Internal Electronic Component Location


Object Number: 840831  Size: LF
(10)Automatic Transmission Output Shaft Speed (OSS) Sensor
(315a)1-2, 3-4 Shift Solenoid (SS) Valve Assembly (ME7 or MN5)
(315b)2-3 Shift Solenoid (SS) Valve Assembly (ME7 or MN5)
(322)Pressure Control (PC) Solenoid Valve (ME7 or MN5)
(334)Torque Converter Clutch (TCC) Pulse Width Modulation (PWM) Solenoid Valve (ME7 or MN5)
(391)Automatic Transmission Fluid Temperature (TFT) Sensor
(395)Automatic Transmission Fluid Pressure (TFP) Manual Valve Position Switch
(440)Automatic Transmission Input Shaft Speed (ISS) Sensor
(811)Transmission Manual Shift Shaft Switch
Figure 2:

Engine Compartment-LF (3.8L)


Object Number: 1617083  Size: MF
(1)Transmission Control Module (TCM)
Figure 3:

Transmission Control Module (TCM)


Object Number: 1742809  Size: LF
(1)Transmission Control Module