Ten food trucks joined taxis and livery services in celebrating the city's initiatives on social media.
Truck owners said they will continue with a petition to get the city to change its "tight regulations."
The city has a $6 million plan to help revitalize the area around Broadway and Lawrence.
The truck will be parked on the festival grounds Friday and Saturday.
A proposed ordinance would permit coffee carts, currently illegal in the city.
The recent addition to Downtown's dining landscape is expanding just two months after opening.
The mayor will appear on "The Great Food Truck Race," as the popular show swings by Chicago.
The city announced 14 food trucks will rotate during this year's Taste, which runs from July 10-14.
Salsa Truck owner Dan Salls opened his lunch spot 'The Garage' Wednesday.
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