My 2000 coupe has recently developed a problem with the a/c. Blows nice and cold on passenger side blows warm to very warm on drivers side going down the interstate. In town driving or in a traffic jam the drivers side will cool down close to the temp of passenger side, also I have noticed that I've developed a hesitation upon heavyexcelleration.Any advice anyone???

 

Sometimes when this happens and the C5 has dual zone capability, the gears that turn the temperature door actuators fail. Uneven heat could also indicate that your system is low in R134 refrigerant. Charging it up is probably the least expensive thing to do first.