GM 19354908
Motor & Linkage

Before installing a new rear Wiper Motor you need to take off the Wiper Arm and weatherseal from their position on the motor pivot shaft. First you should detach the inner trim panel from the endgate area and then pull out the rear endgate window. Detach the Wiper Motor electrical connector before you take off the Wiper Motor bolts and nuts (1, 3) that link the endgate assembly for motor removal. Put the Wiper Motor in place on the endgate then attach it with two bolts at 8 n.m torque. Attach the nuts to their locations and apply the specified tightening force. Install the Wiper Motor electrical connector while putting back the endgate window. Then place the trim panel back onto its proper position on the endgate. Put the spacer in the correct position at the Wiper Motor shaft and put back on the Wiper Arm. Check that the rear wiper system runs correctly as the last step.

For the replacement of the rear window Wiper Motor on the trailblazer or envoy, remove the Wiper Arm at first. Next, remove the nut and spacer from the Wiper Motor shaft then remove the interior trim panel from the liftgate. Disconnect the Wiper Motor electrical connector and remove 2 bolts which secure Wiper Motor to the lift gate to remove the Wiper Motor. For installation, place the new Wiper Motor and seal it using the 2 bolts tightening them with 8 nm (71 lb in). Reconnect the Wiper Motor electrical connector, and reinstall the interior trim panel, and then put spacer and nut on the Wiper Motor drive shaft, tighten the nut to 8 nm (71 lb in). Finally, reinstall the Wiper Arm.

Start by uninstalling both the Wiper Arm and both parts from the Wiper Motor shaft to reach the rear window Wiper Motor on trailblazer and envoy models. Unbolt the interior trim panel of the liftgate and detach its electrical connection with the Wiper Motor. Take out the Wiper Motor from its base by removing both bolts that hold it in place on the liftgate. Place the new motor into position and fasten it to the liftgate using the 2 bolts until they reach 8 n.m of torque (71 pounds of force). Reconnect the Wiper Motor wiring and put back the interior trim panel. Install the spacer and nut onto the Wiper Motor shaft while turning them to 8 n.m (71 lb in). Finally, attach the Wiper Arm.

To install a rear window Wiper Motor for the trailblazer or envoy, first take off the Wiper Arm. Another thing to do is to remove the nut and spacer from the Wiper Motor shaft, and then remove the interior trim panel from the liftgate. Unplug the Wiper Motor electrical connector and unscrew the 2 bolts of Wiper Motor that hold it to the liftgate before taking off the Wiper Motor. Installation should start by fixing the new Wiper Motor into position and fasten it using the 2 bolts, tightening to 8 nm (71 lb in). Connect the Wiper Motor electrical connector back in and then replace the interior trim panel on the liftgate. Lastly, replace the spacer and nut on the Wiper Motor drive shaft by spinning the nut down to 8 nm (71 lb in), then reall the Wiper Arm.

First, remove the wiper transmission assembly.

Secure it with the 3 screws (Wiper Motor Cover Screw), tightening them to 3 N.m (27 lb in).

Reconnect the wiper motor electrical connector, reinstall the interior trim panel, and then place the spacer and nut back on the wiper motor drive shaft.

Remove the 4 bolts securing the reinforcement panel.

Tighten them to 8 N.m (71 lb in).

Reinstall the interior trim panel on the liftgate.