Not that we would ever have to but it appears that vehicle would be quite easy to prvent the doors from opening with a legth of pipe wedged between the welded frame and the door.
Left hand side of the vehicle in front of the tire, you will see that the steering box is exposed. It’s body is made out of cast steel and at best is 3/16 of an inch thick. It is kind of brittle. A .30 caliber steel jacketed bullet should be able to punch a hole in it. This will either cause it to jam, or all the P/S fluid will drain out making it a bitch to steer due to the caster settings used on power steering equipped trucks and because of the width of the tires.