GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2003 🢒 GMC C Sierra - 2WD 🢒 Body and Accessories 🢒 Seats 🢒 Power Seats Schematics
Figure 1:

Driver Seat Controls - w/AG2
Object Number: 871668 Size: FS
Master Electrical Component List
Power Seats System Description and Operation
Front Passenger Seat Controls - w/AN3
LBEC 1, LBEC 2, MBEC 1
G304, G305
G306, G390
Figure 2:

Front Passenger Seat Controls - w/AN3
Object Number: 871678 Size: FS
Master Electrical Component List
Power Seats System Description and Operation
Driver Seat Controls - w/AG2
LBEC 1, LBEC 2, MBEC 1
Lumbar/Bolster Schematics
Lumbar/Bolster Schematics
G306, G390