Wow, u r lucky it has not been repo yet. you have 2 choices
1) call credit co, work out pymt plan & keep truck, or sell it on your own
2) If you have it repo-ed, it works like this, say u still owe 9000 on truck, they repo & resell it for 5000.
now u still owe the credit co 4000. !
I would go with option 1.

