Overheating

Thanks Ken for the information. I have not had an overheating issue for the past week, so I am not sure what the issue is. I will keep testing and keep you posted.

Greetings ken just wanted to follow up with you in ref to my 2013 chevy cruz LT I had a test performed on the veh and to my relief its not the head gasket and I have not had an overheating problem since the end of july however what I am now experiencing is the coolant in the reservoir is boiling over and I am loosing coolant here are the symptoms I am now currently experiencing
i drive ride-share here in las vegas so I am on the road an average of 8 hours per day now the rides are relatively short about 3 miles etc from downtown to the strip so not too far. I had an oil change performed on monday and the mechanic offered to run a complimentary test fore I had told him about the prior overheating issue, after he ran the test he said that head gasket is fine, his theory was the coolant reservoir cap may be defective or that the thermostat is sticking, for he did not detect any pressure on the hoses attached to the reservoir I started with the replacing the cap with a AC Delco cap I replaced the old cap yesterday I drove all day no issues now when I drive home approx 19 miles from downtown las vegas to my residence in henderson once I park in my garage thats when the fun starts I hear, smell and witness the coolant resevoir reaching its boiling point and I find myself standing in a puddle of coolant. This has only been happening on that 19 mile drive home on the freeway. I have also seen once the system depressurizes I see spots of coolant on the ground, this morning the coolant reservoir was completely empty and I cannot find the source, it totaly discharged I han I had to top it off to the coolant level was back at the first rib of the reservoir. The question I have is does the cap have to be perfectly centered with the psi marking reading upright for it has not been I just have been tightened it all the way down, here are the issues
air is getting into the cooling system causing the reservoir to boil out
i am loosing coolant but not sure from where
your input is appreciated for I hope to help any other chevy owner who may be having the same issues
thanks

pic below is coolant reservoir after coolant boiled out and cap not centered

Hi ken
update I drove tonight no problem to report in reference to coolant boiling out of reservoir when I drive on surface streets no problem but I failed to mention I have to drive uphill to get to my residence that is when the coolant in reservoir has reached its boiling point and is leaking out and I am standing in a puddle can a stuck closed thermostat cause this doing my research I am beginning to think my thermostat is bad this problem only happens when I drive uphill I recorded a video on my cell phone but am not sure how to get it to you so you can see the issues im having this only happens when I drive uphill to get to my residence

Greetings ken
yes I can see and hear the fans working here is where I am with this entire situation
found one of the hoses connected to coolant reservoir was not sitting flush on the lip of the connection that goes to reservoir had the clamp adjusted and tightened so this morning when I got home from work it still boiled over but I did not lose all of the coolant in the tank as this usually happens so this worked, however after the car sitting for 6 hours I saw the usual coolant leak on the garage floor I am attaching a pic right below the right side of the vehicle so there is an invisible leak going on somewhere that is not visible to the eye a hose a clamp who knows for wherever the coolant is slow leaking from that is where air is getting into the system now I have replaced the radiator cap and tightened the hose and clamp I cannot see any leakage coming from water pump for I would be able to see it leaking on belts and its not the head gasket the thermostat was suspect but I have had several mechanic friends argue that this may not be the cause for I am no longer overheating and the theory is as I have heard is if the thermostat is stuck in closed position then I would overheat within 15 min of driving and that is not happening so what I need to know is how do I determine where the coolant leak is coming from is there a test or a dye that can be put in coolant reservoir to find the leak for when the leak is found that should solve this issue im having this situation is so frustrating I plan on getting rid of this car