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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 11 (Automatic Transmission - 6T40 - DTC P0973 To DTC P2764 And Troubleshooting Procedures) >> Diagnostic Information and Procedures >> Manual Mode or Tap Up/Down Diagnosis

Manual Mode or Tap Up/Down Diagnosis

WARNING: This page is about a different variant/trim than selected.
  1. If any DTCs are set, diagnose those DTCs first. Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
  2. If the Manual Mode or Tap Up/Down does not function, refer to the Circuit/System Verification for DTC P0815, P0816, or P0826 .
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