GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2005 🢒 Montana - 4WD 🢒 Accessories 🢒 Rear Parking Assist 🢒 Rear Parking Assist Schematics
Figure 1:

Rear Object Sensor Control Module, Power and Ground
Object Number: 677420 Size: FS
Master Electrical Component List
Object Detection Description and Operation
Object Sensors
IGN Main 1, SDM, T/SIG, CRUISE and PCM PASS KEY/CLUSTER Fuses
IGN Main 1, SDM, T/SIG, CRUISE and PCM PASS KEY/CLUSTER Fuses
IGN Main 1, SDM, T/SIG, CRUISE and PCM PASS KEY/CLUSTER Fuses
Engine Data Sensors - MAF and VSS
G302, Page 1 of 3
G302, Page 1 of 3
Backup Lamps
G402
Figure 2:

Object Sensors
Object Number: 677424 Size: FS
Master Electrical Component List
Object Detection Description and Operation
Rear Object Sensor Control Module, Power and Ground