GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2007 🢒 Sierra Classic - 2WD 🢒 Seats 🢒 Seat Heating and Cooling 🢒 Heated/Cooled Seat Schematics
Figure 1:

Heated Seat Controls (AN3)
Object Number: 1778717 Size: FS
Master Electrical Component List
Heated Seats Description and Operation
Control Module References
Pasenger Heated Seat Controls
Power, Ground, Serial Data, and Seat Controls
G304, G305, G306, and G390
Power, Ground, DLC and Splice Pack SP205
Seat Motors and Position Sensors
Figure 2:

Heated Seat Controls
Object Number: 1778718 Size: FS
Master Electrical Component List
Heated Seats Description and Operation
Control Module References
Driver Heated Seat Controls (AN3)
Power, Ground, DLC and Splice Pack SP205
Seat Motors and Position Sensors