I have a 2006 Chevy Equinox. Temperature gauge shoots up to red, but not over heating. Jumps up and down. Fan works. Also I have no heat.
First thing is to check the coolant level, is it low?
I bet your thermostat is failing. It gets stuck causing the engine to get hot and then opens which cools it off and cycles over and over.
Looking for a Used Equinox in your area?
CarGurus has 61,015 nationwide Equinox listings starting at $1,600.
Search Chevrolet Equinox Questions
Chevrolet Equinox Experts