2010 gmc terrain replace rear wiper - 2010 GMC Terrain

either debris or latch / linkage damage /disconnect crawl into back with a flashlight and long screwdriver remove the plug in rear panel and use screwdriver to move latch release

There are no grease fittings on the 2010 GMC Terrain.
The only items you can apply a thin film of white spray lithium grease are the door, hood and rear hatch hinges.

2010 gmc terrain
https://www.parts.com/index.cfm?fuseaction=store.PartInfo&PartNumber=12621820&VehicleID=208990&diagram=FJ10135&Title%3D-2.4-LITER-KNOCK-SENSOR

You have to check the transmission for the wipers. The wipers themselves could have stripped bases but if thec2 wipers stopped together it is probably the transmission.

under hood on firer wall

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There should be a button or lever at the base of the head rest. They are not always easy to see. It will either push or pull to release it.

take your finger or small screw driver pry small flat shiny piece that has a small bend on it prey that back a little. What that piece does is it sits against the shaft keeps the wiper from coming off your just prying it out enough so you can pull the wiper off. Some times these wipers have been on a long time you have to tap the lightly to free them up not to hard easy. also look at your new wiper that you bought you will understand it better. Hope this helps

Lift up on the wiper assembly and slide the wiper blade off.
You will find there is no aftermarket blade refill that fits the 2010 Terrain. You will have to settle for a 12" refill.

It is located on the driver's side just above the engine firewall at the cowling outside of the windshield wiper. It is a metal stud identified by the letters 'GND' stamped on the metal.

My wipers did this today in the middle of a storm. How did you fix yours?