You must remove the seat from the truck. It is attached to the floor of the cab with 4 bolts, I think. When you get the seat out, turn it over and you will see how the arm rest is attached.
Under the center console. Remove 2 screws under cup holders, 1 screw under 1/2 inch plug behind armrest, remove cover behind and underneath armrest (pry off) to get to 2 screws holding armrest on and remove it.
Remove (or have a professional remove) the center console. The cup holder may or may not be repairable.
To remove the armrest in a 2002 Dodge Caravan, locate the bolts holding it in place. Remove the bolts and carefully life the armrest off the seat.
how do you remove armrest from 1994 Lexus gs 300
Screwdriver
If you are talking about the arm rest lid, you have to remove the screws at the hinge. If you are talking about the base, it is part of the console and requires more work.
remove the window handle, remove screws from armrest, remove the inner door handle and the screw on the lower rear of the door panel, lift the panel upwards to remove from the slots along the bottom of the door.
Unzip the armrest cover and pull forward. You will the see the bolt that holds the armrest onto the seat.
Using a flat head screw driver, pop off the two plugs that are oval shaped on both sides of the armrest (the plugs are located below the armrest to the side of the seat in the console). Inside you will see two hex screws on each side. Remove the screws and the armrest and bracket list up. I haven't figured out how to remove the bracket from the armrest yet.
You need to pop out the plastic cover over the nut in the armrest. Then use a 14 mm deep socket to remove the armrest. The job takes less than a minute.
push in armrest at pivot point turn armrest to rear over the top and pull off
In the lower part of the armrest, there are two holes, at the end of these holes there is a phillips (cross) gead screw, remove those and the armrest should come out.