GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2004 🢒 Park Avenue 🢒 Accessories 🢒 Rear Parking Assist 🢒 Rear Parking Assist Schematics
Figure 1:

Power and Ground
Object Number: 660992 Size: FS
Master Electrical Component List
Object Detection Description and Operation
Sensors and Displays
Battery Voltage Supply to Underhood Fuse Blocks
Left Underhood Fuse Block- OXY SEN and SBM LCM Fuses
Left Underhood Fuse Block- ABS, PCM, HZDT/SG, F/PMP and LP PK Fuses
Backup Lamps
Gages
G400 (1 of 2)
Inside Rearview Mirror Schematics
Figure 2:

Sensors and Display
Object Number: 660995 Size: FS
Master Electrical Component List
Object Detection Description and Operation
Power and Ground