How late, exactly, are you?
How old is the loan?
If you are going thru a temporary situation, call and ask the lender for an extension. What they will do is defer one or two payments to the end of the contract and will not report you as late, once they agree to the extension. Interest will still accrue, however, and there might be a fee for setting up the extension.
And read the back of your contract to find out where you stand as far as potential reposession. In Ca., as example, the contract says they cannot reposess unless the loan becomes 90 days delinquent.