If I remember right your truck's VIN is stamped in 3 places, the body by the windshield, on the frame....and I think the 3rd is on the engine. Not positive about that. It's another one of those "anti theft devices" that causes more hassle than it's worth. I'll take a peek under my truck if I have time after work and see if I can find where they put it.
Edit: I found this list after a little googling.
Here's How to Find Your Car's VIN
The table below will help you locate your car's unique DNA - its unique vehicle identification number. VINs are normally located in several locations on a car, but the most common places are:
- On the door frame/door post of the front doors (usually driver's but sometimes passenger's)
- On the dash near the windshield
- On the engine itself (machined pad on front of engine)
- On the car's firewall
- In the left-hand inner wheel arch
- On the steering wheel/steering column
- On the radiator support bracket
- On your car's title, registration, guarantee/maintenance book or on the declarations page of your auto insurance policy