In some cases the shocks can be unbolted and removed with the entire rear of the vehicle jacked up and sitting on jack stands to unload the springs. However, for safety sake, it is a good idea to get coil spring compressors and just tighten them snug too keep the spring from expanding when you remove it from the mounting studs. Advance Auto and Auto Zone loan these tools out for freee. It is a good idea to get some WD40 or evem better PB Blaster and soak the mounting nuts and hardware as long as possible. During the first couple of soaks, wipe them threads off as clean aspossible and then re-soak. Do this as many times as you can and try to let it soak overnight at least once. You can still drive the vehicle, just keep soaking the hardware. This willl make removing it much easier and help to avoid stripped hardware. The longer you soak it the better.