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

LF Radiator Support (w/Allision Transmission)


Object Number: 656585  Size: MF
(1)Transmission Control Module Connectors
(2)Transmission Control Module
(3)Powertrain Control Module (PCM)
Figure 2:

Automatic Transmission (Allison)


Object Number: 656472  Size: MF
(1)Automatic Transmission Turbine Speed Sensor Connector
(2)Power Take-Off (PTO) Connector
(3)Output Speed Sensor Connector
(4)Transfer Case Selector Shift Control Switch
(5)C175
(6)Park/Neutral Position (PNP) Switch Connectors
(7)Allison Transmission
(8)Engine Harness
(9)Automatic Transmission Input Shaft Speed (AT ISS) Sensor Connector