I am SO glad I'm not the only one who sees this mystery voice as an integral part of Hershey!
As others have said, what I remember, (and what all the English - for such I am - friends who have come with me over the years remember) is 'There is a 1969 Chevrolet truck parked in vendor space XX00. If this vee-hicle is not moved IMMEDIATELY it WILL be towed'. To British ears the pronunciation 'vee-hicle' is very singular.
Also 'This year's Fall Meet commemorative painting is by the artist Ken Eberts and is available at the AACA vendor tent in the Chocolate Field'...
But who is it? And if he has been doing the PA system messages since 1968, how old is he??