Anti-theft light "on" 2003 grand caravan

Have red light showing on instrument panel–book shows it is 'anti-theft" light. Do not have anti-theft on this car–light was never on for first seven plus years–unable to get it to go “off”

The red light is for the immobilizer system (SKIM). If your vehicle is not equipped with SKIM the dealer has a reset procedure, TSB 08-015-04.