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Home >> Chevrolet >> 2001 >> C3500 HD 6.5 F, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 6.5L - Troubleshooting >> Symptoms - Engine Controls >> Before Using This Section
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Before Using This Section

Before using this section, you should have performed the Diagnostic System Check-Engine Controls and determined that:

  1. The control module and the malfunction indicator lamp (MIL) are operating correctly.
  2. There are no diagnostic trouble codes (DTCs) stored, or a DTC exists but without a MIL.

Several of the following symptom procedures call for a careful visual and physical check. The visual and physical checks are very important. The checks can lead to correcting a problem without further checks which may save valuable time.

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