Kind of an old thread but my 2 cents
Likely your wife had wipers in the delay setting when this happened?
This might indicate an intermittent wiring connection with what is known as the Wiper "Park" switch. Or problem with the Park switch itself in the wiper motor assembly. More likely the later.
What happens is that when in delay mode the wiper system tries to command a single wipe of the blades. The "Park" switch tells the computer when the wipe cycle is complete.
I guess GM Oshawa is where the GM Technical Assistance folks for GM of Canada are, right? Those are the right ones to help dealer
Likely your wife had wipers in the delay setting when this happened?
This might indicate an intermittent wiring connection with what is known as the Wiper "Park" switch. Or problem with the Park switch itself in the wiper motor assembly. More likely the later.
What happens is that when in delay mode the wiper system tries to command a single wipe of the blades. The "Park" switch tells the computer when the wipe cycle is complete.
I guess GM Oshawa is where the GM Technical Assistance folks for GM of Canada are, right? Those are the right ones to help dealer
