Hello,
I am new to the forum and recently got a 98 Seville SLS. overall, great car but the A/C seems to work well on the pasenger side but not the driver side. I checked the freon and it seams to be fine. (not low) Idea's? is there a sensor that needs replacing? if so, how dificult a job is it getting to the sensor? I would appriciate your help as I am still not familier with this car. thanks!

Either you have an air blend door actuator problem or it is low on refrigerant (common symptom on dual zone A/C systems). One actuator is visible after removing the glove box and the other from below after removing the insulator panel. Run the temp up and down and watch the actuator movement. If that is OK, you are probably a tad low on refrigerant.