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Home >> Buick >> 1998 >> Park Avenue Ultra >> Repair and Diagnosis >> Body & Frame >> Windows >> Power Window System >> System Testing >> Express Down Feature Inoperative

Express Down Feature Inoperative

  1. If power window diagnostic system check was performed, go to next step. If power window system check was not performed, go to see SYSTEM CHECK.
  2. Replace driver door module (DDM). Recheck system operation.
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