GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2004 🢒 Savana - AWD 🢒 Transmission/Transaxle 🢒 Automatic Transmission - 4L80-E/4L85-E 🢒 Automatic Transmission Controls Schematics
Figure 1:

Valve Controls and Switch Inputs
Object Number: 1244091 Size: FS
Master Electrical Component List
Transmission Component and System Description
Stop Lamp, Tow/Haul, Park/Neutral Position Switch Inputs and Speed Sensors
OBD II Symbol Description Notice
Crank, IGN 0, TBC ACC, FR WPR, BRKS and HVAC Fuses
Crank, IGN 0, TBC ACC, FR WPR, BRKS and HVAC Fuses
Figure 2:

Stop Lamp, Tow/Haul and Park/Neutral Position Switch Inputs and Speed Sensors
Object Number: 1244178 Size: FS
Master Electrical Component List
Transmission Component and System Description
Valve Controls and Switch Inputs
OBD II Symbol Description Notice
I/P Dimming Supply Voltage 1 of 3 and LED Dimming Supply Voltage
IGN B Fuse, ACCY/RUN and RUN/START Bus Bars
Spare, IGN E, SIR, TBC IGN 1 and ISRV Fuses
w/o JL4
Power, Ground, Serial Data, Indicator and Stop Lamp Switch - w/o VSES
Data Link Connector (DLC)
G302
G102