Tip - How to Remove a Wiper Motor Cowl on a GMC Truck | eHow

Your GMC truck has a black, plastic cowl that covers the linkage arms on the wiper motor. The cowl serves as a barrier between these arms and potentially harmful debris. To service or replace the wiper motor, you must remove the cowl to access the motor's control arm, which connects to the linkage arms. You can remove the wiper motor cowl on your...