Wipers in "on" position, wiper motor audibly running, neither wiper blade would move across windshield, both remain stationary. can manually move both blades freely, no binding, in unison validating linkage between the two blade arms were still connected. suspected motor shaft/spline connecting to the "blade transmission" was disconnected, stripped, or fell off. to ensure not an electrical issue, removed 25 amp fuse (no. 29) from engine compartment fuse buss and inspected fuse. fuse intact and in like new condition. reinstalled the fuse resuming motor function. drove the vehicle to valentine gmc buick, fairborn, ohio and asked service mgr if a tsb referencing this safety issue had been reported. the service mgr did not comment; instead he showed me an illustrated parts breakdown of the area in question pointing to the blade transmission. to confirm my diagnosis, he had one of their mechanics inspect the area in question pending the removal of a panel. service mgr followed by stating i "might" not have to pay, depending on the problem. the inspection proved it was indeed the wiper blade transmission p/n 25948436, gm at fault. the service mgr also stated parts on-hand followed by a $250.00 quote to replace. with the area in question apart, i concurred with the work which was done in a few minutes. after examining the bill, i crossed this part number on-line and found countless genuine gm sources charging far less; $95.16, to be exact (less shipping and includes 1 yr warranty). i brought it up to their attention and was told their list price is $199.95 with the same 1 year warranty, and the labor cost was discounted down to $85.00 per hour. regardless of costs, the fact remains; low or no visibility could result in a crash causing injury or death unless addressed. recommend researching other vehicles carrying this part for potential failure.
Tl* the contact owns a 2012 gmc terrain. while driving approximately 65 mph the contact opened the rear driver and passenger side windows and noticed the sunroof began to vibrate violently. the vehicle was taken to the dealer for diagnostic testing. the technician stated nothing could be done because the vehicle was designed that way; therefore, there are unable to repair the vibration. when the contact opened the front and rear driver and passenger windows the vibration did not occur. the vehicle was not repaired. the approximate failure mileage was 5,700.