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2000
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Chevy Express G3500, Van Cargo, 7.4 J
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Repair and Diagnosis
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Accessories & Equipment
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Communication Devices
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Data Link Communications System
Data Link Communications System
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Model Identification
Description & Operation
Notes
UART Data Line
Class 2 Data Line
Remote Control Door Lock Receiver Programming
Component Locations
Trouble Shooting
Preliminary Inspection
Self-Diagnostic System
Notes
Diagnostic Trouble Code Definitions
Diagnostic Tests
DTC U1000 & U1255: Class 2 Communication Malfunction
Description
DTC Parameters
Diagnostic Procedure
DTC U1001-U1254: Lost Communication With XXX
Description
DTC Parameters
Diagnostic Procedure
DTC U1300 & U1301: Class 2 Data Link Line Voltage Low/High
Description
DTC Parameters
Diagnostic Procedure
System Tests
Scan Tool Does Not Power Up
Description
Diagnostic Procedure
Scan Tool Does Not Communicate With Class 2 Device
Scan Tool Does Not Communicate With UART Data Line
Notes
Description
Diagnostic Procedure
Connector Identification
Wiring Diagrams