Cadillac Repair: 97 cadillac catera, cadillac catera, plastic jug

Question
 I have a 97 catera and the radiator warning light has come on and doesn't go away and while I'm driving the car does not overheat and there is no steam coming from underneath the hood where should I start and where can I find the repair manual for this car thanks a trillion to anybody that can help!!!!!!!!!!!!!

Answer
You need to FIRST check to see that the coolant over flow plastic jug is at it's indicated full mark. If it is, Then you need to replace the warning light sensor which you can get at any dealers parts department and tey willl show you where it is located.