Do it yourself, change the rear tailgate support struts on your Jeep Grand Cherokee, produced between the years 1999 and 2004. In order to make this replacement, you will need a T40 torx driver and probably a second person, to help you in supporting the tailgate at the time you remove the struts. You can make this repair in less than 15 minutes.
Overtime, the cylinders of the struts wear out, causing the tailgate to sag. Fortunately you can replace them quite easily. You should start the replacement process by securing the tailgate of the car. Use a second person to lift it up and hold it, or a piece of wood or a broom, in worst case. After you do that, you can work to remove the first strut. You should use a T40 torx driver on the screw on bottom side first, as seen in the image below.
Be careful, because after you remove this first screw, the tailgate will be supported by only one strut. Move to the screw on the upper side (see picture below), remove it also and replace the old strut with a new one.
Secure the new part with the two screws and move to the other one, where you can repeat the process. These are the steps you need to follow, if you wish to remove and replace the tailgate support struts on your Jeep Grand Cherokee, the model made between the years 1999 and 2004.