rear wiper access on 2004 Buick Rendezvous

how do I get to the read wiper. It works irregularly.

Asked by for the 2004 Buick Rendezvous
The wiper arm may be loose on the motor shaft. If the arm is loose try tightening the nut holding the arm on. If the arm is tight then you must remove the end door trim to access the wiper motor.
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