GM Service Manual Online
For 1990-2009 cars only
Makes
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GMC_Truck
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2007
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Sierra - 2WD
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Diagnostic Navigation
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Vehicle Diagnostic Information
🢒 Scan Tool Data Definitions
Battery Voltage:
The scan tool displays the current state of the battery in volts.
Horn Relay Command:
The scan tool displays Off/On. The horn output indicates the state that the control module has commanded for the relay.