GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2003 🢒 Envoy - 2WD 🢒 Body and Accessories 🢒 Entertainment 🢒 Door Control Module Schematics
Figure 1:

Driver Door Module Power and Ground
Object Number: 743601 Size: FS
Figure 2:

Serial Data and Subsystem References
Object Number: 897831 Size: FS
Figure 3:

Front Passenger Door Module Power and Ground
Object Number: 743605 Size: FS