GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2008 🢒 Sierra - 4WD 🢒 Transmission/Transaxle 🢒 Automatic Transmission - Allison 🢒 Automatic Transmission Electronic Component Views
Figure 1:

Transmission Control Module (MW7)
Object Number: 1670291 Size: MF
(1)Transmission Control Module
(2)Transmission Control Module Connector
(3)Radiator Fan Shroud
Figure 2:

Engine Harness to Transmission
Object Number: 2033589 Size: MF
(1)Turbine Sensor Harness Connector
(2)Power Take-Off (PTO) Connector
(3)Output Speed Sensor Harness Connector
(4)Transfer Case Selector Shift Control Switch
(5)Transmission Connector Harness
(6)Allison Transmission
(7)Engine Harness