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2002
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Blazer 4D Utility, 4WD, Part Time
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Repair and Diagnosis
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Data Link Communication System
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Diagnostic Information & Procedures
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DTC U1300, U1301 OR U1305: No Valid Messages Are Detected On The Class 2 Serial Data Circuit
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Symptom List
Symptom List
Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:
SCAN TOOL DOES NOT POWER UP
SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE