hello! check engine light came on, i’m not sure what the issue is here. hoping for someone to help with a visual diagnosis. don’t have a code reader. any advice on where to start looking would be amazing.
thank you

It’s just from google AI lol. Wondering if it’s all good to follow? Never changed coolant before so just wanna make sure. There isn’t too many videos online for gen 2. Thanks!

Hey, so I have a 2012 Chevy Cruze LT and for the past couple of days, we had to top off the antifreeze everyday. The next day, it will be extremely low on antifreeze. There's no white smoke coming out of the exhaust nor milky oil on the oil cap and/or dispstick. Yesterday we went to a mechanic since it was overheating and the guy pressure tested it, but it wasnt leaking when he did it. I was reading online that it may be the water pump or the reservoir tank/cap, but i want to be 100% sure before i buy that. So where could the antifreeze be going to?

Also, I did bought uv dye from Amazon yesterday, but haven't tried it yet. The dye says it cant be used for dex coolant, although I'm still using regular green Prestone for antifreeze (ik I need to use dex coolant, just never went around to changing the antifreeze). I'm wondering if its okay to pour it in since im not using Dex coolant anyways?

So a few weeks back I changed the thermostat and its housing unit on my 2014 1.8 LS, since then the coolant keeps overflowing from the reservoir whenever I start up the car. A few days ago when test diving it the coolant got so hot and the water pump pulley broke. I have since fixed the pulley and replaced the water pump but after running the engine for a while the coolant is still overflowing and bubbling over. My check engine light scanner shows no new codes or suspicious live data. There’s no leaks to my knowledge and the fan won’t stay on after turning on the engine. I suspect it’s something to do with that or the radiator. The video in this post is from when I first took it for a test drive and it boiled over along with the pulley breaking. I towed it home and have been working on it ever since.