How many miles are on your car? As long as it's under the mileage mark for the warranty I don't see why they wouldn't cover it. Maybe a loose fitting or a cracked line.
Malibujohnny- what year is your car and what powertrain do you have ,so we can help you?
I have a 2008 ltv6 and the lower line is leaking. How hard is it to replace and any tips before I start?