GM Service Manual Online
For 1990-2009 cars only
Makes
🢒
Buick
🢒
2009
🢒
Lucerne
🢒
Power and Signal Distribution
🢒 Data Communications
Power and Signal Distribution
All Description and Operation
Body Control System Description and Operation
Data Link Communications Description and Operation
Diagnostic Procedures
Data Link References
Diagnostic Starting Point - Data Communications
Scan Tool Does Not Communicate with High Speed GMLAN Device
Scan Tool Does Not Communicate with Keyword Data Line
Scan Tool Does Not Communicate with Low Speed GMLAN Device
Scan Tool Does Not Power Up
Symptoms - Data Communications
Diagnostic Trouble Codes
Control Module U Code List
DTC B1000
DTC B1001
DTC B1016
DTC C0550
DTC U0020
DTC U0073 or U2100
DTC U0100-U0299
DTC U1814
DTC U2099
Electrical/Electronic Schematic Diagrams
Body Control System Schematics
Data Communication Schematics
Removal, Installation, and Replacement
Body Control Module Replacement