Lots of air in system. Close valve, helper depresses peddle, open and close valve to extract air - fluid without lifting peddle. With valve closed lift and depress peddle again. Repeat process many times until clear and steady while watching master cyl fluid level never gets lower than 1/3. Having the fluid extraction hose in a clear container immersed in fluid will aid in seeing air bubbles.
If the blower is blowing air just fine, but you cannot control the temperature, you need to listen to air coming from the vents while turning the temperature from hot to cold. If you do n ot hear any change in airflow, then you may a temperature door in the dash broken. this is becoming a common problem on the Equinox Tech JK
may be a oil level light sensor faulty or a oil pressure sensor faulty ,,,, if nor it may be a wear issue in engine ,,, or blockage in oil pickup pipe ,,,, either way get it checked fas before you damage the engine ,,, costly if you dont
