Two possibilities come to mind, although there could be more based upon facts that I don't yet know:

1. You were defaulted, and this is a post-judgment matter. Check with the courthouse to see the status of the case.

2. The threat is in relation to their attempt to repossess the vehicle, and they're alleging that you're hiding the vehicle from repossession.
Quote Quoting Georgia Code § 16-9-51. Destruction, removal, concealment, encumbrance, or transfer of property subject to security interest
(a) Except as provided in subsection (b) of this Code section, a person who destroys, removes, conceals, encumbers, transfers, or otherwise deals with property subject to a security interest with intent to hinder enforcement of that interest shall be guilty of a misdemeanor.

(b) A person who destroys, removes, conceals, encumbers, transfers, or otherwise deals with property subject to a security interest with intent to hinder enforcement of that security interest and in so doing does damage to such property in an amount greater than $500.00 shall be guilty of a misdemeanor of a high and aggravated nature.

(c) In a prosecution under this Code section the crime shall be considered as having been committed in any county where any act in furtherance of the criminal scheme was done or caused to be done.