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Chevrolet
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1997
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C3500 HD 7.4 J, Automatic
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Repair and Diagnosis
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External Pages
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Different variant/trim
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Section 3 (Engine Controls - Tests W/Codes - 6.5L)
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Diagnostic Trouble Codes
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DTC P1641 - Malfunction Indicator Light (Mil) Control Circuit
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Diagnostic Aids
Diagnostic Aids
WARNING:
This page is about a different variant/trim than selected.
A faulty bulb or short to ground in MIL control circuit will cause DTC P1641 to set.
Fig 1: Instrument Cluster Diagram