If you have to file bankruptcy, you can protect (exempt) a portion of the equity in the car.
The bankruptcy will discharge the mortgage balance remaining.
The Oregon exemption: #18.345 - Motor vehicle to $2,150
So, you should get a local appraisal on the truck, since online bluebooks are sometimes high. If after subtracting the loan balance and the exemption, if there is still equity, you can buy that back from the court (give them the cash difference) to keep the vehicle.
If you sell before the case is filed, that must be disclosed, you must receive fair market value, and you must spend down on your necessities, since the court will examine that transaction.
Hopefully your value is low enough to qualify for chapter 7
. You can also file chapter 13, to pay back enough debt to protect and keep the truck, adding the truck note into the consolidation as well. Good Luck.