Can your truck be repossessed if you are using it for income?

Yes, your truck can be repossessed even if you are using it to earn an income, however, you can tell your creditor that you are earning money with your truck, and that if the creditor does not repossess the truck you will use that income to make payments on your loan. Of course, if you are not making payments, and spending all of your income on other things, then the creditor has no motive to let you keep the truck.