GM Service Manual Online
For 1990-2009 cars only
Makes
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Chevrolet
🢒
2009
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Express
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Diagnostic Navigation
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Vehicle Diagnostic Information
🢒 Data Communication Schematics
Figure
1:
Low Speed GMLAN
Figure
2:
High Speed GMLAN 4.3L/4.8L/5.3L/6.0L
Figure
3:
High Speed GMLAN 6.6L