GM Repair Questions? Ask a Mechanic for Answers ASAP
The module that controls the wipers is the problem, The module is located on the wiper motor and can be replaced without replacing the whole motor assembly.
The wiper motor is located under the cowl, the plastic panel between the windshiled and the hood. You have to take off both wiper arms to remove the cowl panel.
The module is number 3 on the diagram below.