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I need some advice on how to replace the wiper motor on my 2012 Grand Sport. Fuses and relays are good, and I have a new motor, but I'm weary about undoing anything before I have a procedure on how to re-calibrate the wipers. I've only been able to find stuff on C5's but nothing on C6's.
Sorry.... Didn't mean to poke fun at your issue ... And sorry I don't have any good answer but sure some of the experts will chime in....
Good luck with the repair and please keep us updated with the process
Also before I would be swapping parts, are you positive the motor is bad? I've got a 1991 Buick that the wiper motor is original and still works great, wouldn't think that motor would burn up even if it's a daily driver being it's not that old yet?
According to the Service manual section, Park Position Operation
Windshield wiper motor park operation is controlled by the body control module (BCM) using an input from the park switch that is located within the wiper motor assembly. The BCM monitors the windshield wiper motor park switch signal circuit, which includes the 10 A WIPER DWELL fuse, to determine if the windshield wiper blades are at the bottom of the glass. During wiper operation, each time the wiper blades are at the bottom of the glass, the park switch is momentarily closed to ground signaling the BCM the wiper position. When the wiper switch is turned to the OFF position while the wiper motor is somewhere in mid-cycle, the BCM will continue to operate the motor until the wipers reach the park position. If the ignition is turned OFF while the wipers are in mid-cycle, the wipers will stop immediately where they are. The BCM will park the wipers the next time the ignition is turned ON.
The wipers will not park when they are commanded ON and OFF with a scan tool. The BCM will park the wipers the next time the wiper switch is turned ON and OFF.
Before putting the blades back on, put power to the new motor to assure that they will park. Once parked, you can install the blsdes, and it should be good to go.
I can include to removal and installation, but it's pretty straight forward. The (3)system module nuts need 89 lb-in of torque to tighten. The wiper system module nut (89 lb-in) The wiper motor (3) nuts also require 89 lb-in to tighten at spec. Approx 7.5 ft-lb
Last edited by 4SUMERZ; 05-21-2019 at 11:42 PM.
Reason: Corrected error. Sould have been lb-in instead of ft-lb for torque
He said something about having to "re-calibrate" the new motor . . . ? Maybe they are computer controlled too, like everything else.
It ain't like the old days Windy. I'm not of much help -- the last time I changed a wiper motor was sometime around 1970 -- give or take.
Yea....you're probably right there. I guess I should be surprised they still called it a wiper "motor". Thought they would have called it something like a "Windshield sweeping device" by now......
05-21-2019, 03:12 PM
C6 Wiper Motor Replacement
Maybe they are computer controlled too, like everything else. 
