GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2008 🢒 Lucerne 🢒 Diagnostic Navigation 🢒 Vehicle Diagnostic Information 🢒 Door Control Module Schematics
Figure 1:

Driver Door Module (DDM)
Object Number: 1886594 Size: FS
Master Electrical Component List
Power Door Locks Description and Operation
Control Module References
Front Passenger Door Module (FPDM)
Figure 2:

Front Passenger Door Module (FPDM)
Object Number: 1886597 Size: FS
Master Electrical Component List
Power Door Locks Description and Operation
Control Module References
Driver Door Module (DDM)