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I have a 2012 cruze 1.8L. First issue i had to replace my coolant reservoir, due to the plastics melting in the hose. Issue fixed. Drove for one day noticed coolant levels were low. Went to put more coolant in an now it just blows out the reservoir. Replaced themostat and coolant temp sensor an still same issue. I noticed that the fan is only working when the ac is on. When ac is off fan doesnt come on at all. Checked all fused an relays. I can manually pull each relay an make all 3 speeds of fan work. Could this Be a PCM issue or ECM. I dont want to keep tossing money at this an that sensor. PLUS the kicker is the vehicle is not showing ANY CODES:angry:. Help please