Front shocks:
Set parking brake and chock rear wheels
Lift front wheels off the ground and put jack stands under lower control arms
Remove front wheels
Remove lower shock bolt 21mm or 22mm socket and box end wrench
Remove top nut by using an open end, box end or ratcheting wrench on main nut while holding top of bolt with adjustable wrench (you'll see the flat spots on the vertical top bolt to grab with the adjustable wrench)
Reverse the procedure to assemble.
Rear:
All four wheels on the ground, wheels chocked, parking brake set
Remove lower shock bolt
Lie on the ground under the back end and look up - you'll see the three bolts that hold the shock in place. Remove those bolts.
When putting in the shocks, the shocks will likely have extended to their full length before you put them in (if you had cut the strap that holds them compressed when they ship). I've just compressed the shocks by hand to get them to fit and I've also used a bottle jack to compress them. Bolt the top end in first, align the shock and slowly use the jack to help line up the shock with the lower bolt hole.