Replaced overflow tank now low coolant light coms on temp guage varies now.
Also just replaced head gaskets.
air may be in system. needs to be bleed.
Yes, air in the cooling system that needs to be purged. I bet you don't have heat either.
Looking for a Used Cavalier in your area?
CarGurus has 612 nationwide Cavalier listings starting at $999.
Search Chevrolet Cavalier Questions
Chevrolet Cavalier Experts
Related Models For Sale