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2021
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Express 2500 LS, 2.8L Eng VIN 1
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Repair and Diagnosis
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Engine Performance
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System
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Data Communications
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Diagnostic Information and Procedures
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DTC B1004
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Circuit/System Verification
Circuit/System Verification
Verify that DTC B1004 is not set.
If the DTC is set, perform the setup procedure on the applicable control module, if the DTC resets replace the module.