GM Service Manual Online
For 1990-2009 cars only
Makes
🢒
Chevrolet
🢒
2009
🢒
Avalanche - 4WD
🢒
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 Low Speed GMLAN Device
Scan Tool Does Not Communicate with Powertrain High 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 B137A
DTC B137B
DTC C0550
DTC C126C, C126D, C12E3, or U180F
DTC U0020
DTC U0073 or U2100
DTC U0074
DTC U0100-U0299
DTC U1500, U1511, U1512, or U1513
DTC U180F
DTC U1812
DTC U1813
DTC U1814
DTC U1815
DTC U1816
DTC U1817
DTC U1818
DTC U1820
DTC U1821
DTC U182A
DTC U1842
DTC U1843
DTC U1862
DTC U1866
DTC U186A
DTC U186B
DTC U1875
DTC U1876
DTC U1878
DTC U1879
DTC U1885
DTC U1886
DTC U1888
DTC U189A
DTC U2099
DTC U209A
DTC U209D
DTC U2100
DTC U2103
DTC U2105-U2199
Electrical/Electronic Schematic Diagrams
Body Control System Schematics
Data Communication Schematics
Mechanical Specifications
Fastener Tightening Specifications
Removal, Installation, and Replacement
Auxiliary Body Control Module Replacement
Body Control Module Replacement
Serial Data Gateway Module Replacement