A driver taking a Passenger endorsement skills test uses a non-passenger truck from the same CDL class. What is the likely problem under 49 CFR 383.117?

1. The Passenger skills test must be taken in a passenger vehicle satisfying the applicable vehicle group
2. The vehicle class is the only thing that matters
3. The test can be completed in any commercial vehicle if the driver has a CLP
4. The driver can add P with a knowledge test only