So I am contemplating taking my Cruze in for program N140417 because my cruze is low on coolant and I am not finding where it is coming from. It is about an inch below full, unfortunately I don't know exactly where it was when I test drove it, because even though I checked oil and everything, that was the one thing I forgot to look at. I have driven 1800 miles since I got it a little over a month ago. On the test drive I paid attention and smelled for coolant as is advised on here in many places and it never came up on my test drive. Unfortunately, about 2 hours into my trip home from buying it, it did have a faint smell. Since then it intermittently smells like coolant. Sometimes I only notice it inside, sometimes only outside, and sometimes I smell it in both places, it is never super strong though, just enough to be noticeable. My question is if I take it in, what is the most expensive thing I can expect to encounter. It is a 12' with 51k miles on it now so it still has powertrain warranty yet, but I know that doesn't cover the vast majority of the cooling system. I am uncertain as to if it would be better for me to buy some dex-cool and put it in myself and see what changes, or if I should just take it in and let them do what they do. I have always owned everything outright and without warranty and have done everything myself, so I am not sure what my best option is on this one.