Officers say that security guards called police after they spotted a man behaving suspiciously on remotely monitored CCTV at Deane Motors on Southport Road in Eccleston.
The police helicopter was called in to support officers in their search for the man who was soon located hiding nearby next to a garage.
A police spokesman said: "We were called at around 3am to a car dealers in Eccleston where a man was spotted behaving suspiciously on CCTV. Our officers located the man, who was hiding nearby, within 30 mins."
The man is currently being held in custody.