Installation Procedure

Install the wiper arm on the wiper motor shaft in the park position with the wiper arm resting on the park ramp.
NOTE: Refer to FASTENER NOTICE in GM VEHICLES CAUTIONS & NOTICES article.
Install the nut on the wiper arm.
Tighten

Tighten the nut to 23 N.m (17 lb ft).

Fig 1: Locating Rear Wiper Arm Components
Courtesy of GENERAL MOTORS CORP.
Install the cap on the wiper arm.
Install the washer hose on the vehicle connector.