changed the waterpump on 2000 caviler and now it wont start
Definetely not normal. Since we don't know what you did, your going to have to go over your work. Something isn't connected properly. Check all wiring and any connections you removed to access the pump.
Search Chevrolet Cavalier Questions
Are you a UK consumer? CarGurus now has a discussion forum in the UK.
Chevrolet Cavalier Experts