2002 Seville STS - has dual zone electornic climate control. The driver side heats up but won't blow much air, adn the passenger side blows a lot of air, but won't heat up? Is this something simple like a fuse, or is it something more?
There are two blend doors on the vehicle. They determine if you get heat or AC. It sounds like they are both not working correctly. It could be an actuator problem, or the temp sensor in the vehicle itself may be bad. I would have those checked.