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Manual Mode or Tap Up/Down Diagnosis

WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.
  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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