GM Service Manual Online
For 1990-2009 cars only
Makes
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Chevrolet
🢒
2007
🢒
HHR
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Diagnostic Navigation
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Vehicle Diagnostic Information
🢒 OnStar Schematics
Master Electrical Component List
OnStar Description and Operation
Control Module References
Underhood Fuse Block - B+ Bus
DLC Power, Ground, and Low Speed GMLAN
High Speed GMLAN
Entertainment/Communication Schematic Icons
G401, G403
G402
