The offer starts Wednesday and runs through May 31st.
The offer is based on 12,000 miles of driving per year at the vehicle's rated fuel economy.
People who buy or lease new Chrysler vehicles will get a card for buying gas that holds the price at $2.99 a gallon.
The card will be linked to the customer's own charge account.
The customer will be charged $2.99 a gallon, with the rest of the bill going to Chrysler.