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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 220 (Automatic Transaxle Diagnosis - 4T65-E) >> Self-Diagnostic System >> Summary

Self-Diagnostic System: Summary

WARNING: This page is about a different car, the 2003 Buick Regal and 2003 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Always clear DTCs once repairs are complete. See CLEARING DIAGNOSTIC TROUBLE CODES  . Road test vehicle and retrieve DTCs to determine if complaint or DTC is repaired.

If no hard DTCs are present, and driveability symptoms or intermittent DTCs exist, attempt diagnosis by symptom, or by testing individual components related to system fault. See TROUBLE SHOOTING  and/or COMPONENT TESTS  . If no problem is found, verify proper electronic control system circuit operation.

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