I have a 200 cadillac seville STS can anybody tell me where my alternator is located.

 

2000 is year of a redesign of the N* and in particular the alternator was changed from liquid cooled to air cooled. It should be on the passenger side of the engine in amongst the pulleys and what not towards the back bank of cylinders.

 

its on the right side under the motor. i just had mine changed and its very difficult unless you know how to do it.