Back door hatch not opening?

Work the latch key while pushing the liftgate inward and then pull it outward, sometimes the latch can hang up or the weather stripping can get sealed to the body. If this does not work it sounds like the activation rod has fallen off the latch opening control. You will need to remove the inner liftgate panel to activate the latch to open the liftgate and complete the repair. Here is a diagram to help you. Check out the images (below). Please upload pictures or videos in your response to any problems so we can see what to help you with.

Do you mean the rear lift gate, or the rear glass itself? What does it do when you try to release it? Click, nothing? Does the rear wiper work properly? The wiper needs to park fully on its own to enable the glass latch to operate. If it's the main hatch does the exterior handle work? If it's the glass hatch, then it's possible it's a broken wire that triggers the release in the hatch to release the glass. Please respond and we can see where to go from there.