"He's through with the Mob... but the Mob isn't through with him."

Confessions of a Hitman

A former hitman named Bruno steals some cash from his mobster uncle. He plans to go to Tahiti, but things go wrong and he finds himself headed for Vegas via Death Valley in a comandeered airport limousine, pursued by his uncle's henchmen and accompanied by a limo driver and an enigmatic blonde.