GM Service Manual Online
For 1990-2009 cars only

Intelligent Switching Unit (ISU)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Wiper Park Switch

Wiper/Washer

Active/Inactive

Active

Wiper Switch

Wiper/Washer

Off/Delay/On

Off

Wiper Washer Switch

Wiper/Washer

Active/Inactive

Inactive