GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2003 🢒 TopKick C-Series (Conventional) C6/C7/C8 🢒 Transmission/Transaxle 🢒 Automatic Transmission - Allison 🢒 Automatic Transmission Electronic Component Views
Figure 1:

Automatic Transmission - Allison®LCT
Object Number: 826824 Size: LF
(1)Automatic Transmission Input Shaft Speed (AT ISS) Sensor
(2)Automatic Transmission Input Shaft Speed (AT ISS) Sensor Connector
(3)Turbine Shaft Speed Sensor (TSS)
(4)Turbine Shaft Speed Sensor (TSS) Connector
(5)Vehicle Speed Sensor (VSS)
(6)Vehicle Speed Sensor (VSS) Connector
(7)Automatic Transmission (Allison®LCT)
(8)Park Neutral Position Switch (PNP)
Figure 2:

Front Left of the I/P
Object Number: 826805 Size: LF
(1)Radio
(2)Park Brake Release Switch
(3)HVAC Control Module
(4)Overdrive Defeat Switch
(5)Headlamp Switch
(6)Instrument Panel Cluster
Figure 3:

Automatic Transmission Fluid Temperature (TFT) Sensor
Object Number: 826870 Size: LF
(1)Automatic Transmission Fluid Temperature (TFT) Sensor Connector
(2)Automatic Transmission Fluid Temperature (TFT) Sensor (Allison® LCT/UTX)
Figure 4:

Transmission Control Module (TCM)
Object Number: 822098 Size: LF
(1)Engine Harness
(2)Engine Control Module (ECM)
(3)Engine Control Module (ECM) Connector
(4)Transmission Control Module (TCM) Connector
(5)Transmission Control Module (TCM)
Figure 1:

Transmission Control Module (M74)
Object Number: 769662 Size: MF
(1)Transmission Control Module Connectors
(2)Transmission Control Module
(3)Powertrain Control Module (PCM) (Gas) / Engine Control Module (ECM) (Diesel)
Figure 2:

Engine Harness to Transmission-Allison
Object Number: 769664 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)Park/Neutral Position (PNP) Switch Connectors
(7)Allison Transmission
(8)Engine Harness
(9)Automatic Transmission Input Shaft Speed (ISS) Sensor