GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2009 🢒 Lucerne 🢒 Power and Signal Distribution 🢒 Data Communications 🢒 SIR Schematics
Figure 1:

Indicators, Power, Ground, Front End Sensors
Object Number: 2081858 Size: FS
Figure 2:

Left Side Impact Sensor and Module, Roof Rail Module, Steering Module, Pretensioner
Object Number: 2081858 Size: FS
Figure 3:

Right Side Impact Sensor and Module, Roof Rail Module, I/P Module, Pretensioner
Object Number: 2081866 Size: FS
Figure 4:

Passenger Presence System
Object Number: 2081871 Size: FS