GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2008 🢒 Sierra - 2WD 🢒 Transmission/Transaxle 🢒 Automatic Transmission - 6L50/6L80/6L90 🢒 Automatic Transmission Controls Schematics
Figure 1:

Module Power, Ground, Serial Data and Stop Lamp Signal
Object Number: 1916870 Size: FS
Master Electrical Component List
Transmission Component and System Description
Control Module References
Pressure Controls - 1 of 2 and Shift Controls
Figure 2:

Pressure Controls - 1 of 2 and Shift Controls
Object Number: 1916873 Size: FS
Master Electrical Component List
Transmission Component and System Description
Control Module References
Pressure Controls - 2 of 2 and Speed Sensors
Module Power, Ground, Serial Data and Stop Lamps Signal
Figure 3:

Pressure Controls - 2 of 2 and Speed Sensors
Object Number: 1916875 Size: FS
Master Electrical Component List
Transmission Component and System Description
Control Module References
Transmission Range Signals and Driver Shift Request
Pressure Controls - 1 of 2 and Shift Controls
Figure 4:

Transmission Range Signals and Driver Shift Request
Object Number: 1916909 Size: FS
Master Electrical Component List
Transmission Component and System Description
Control Module References
Pressure Controls - 2 of 2 and Speed Sensors