hullothere

Looking for information on a slight coolant leak on my 2015 GMC Duramax truck. The truck runs great. No warning lights. Coolant tank looks a bit full, but otherwise have not found any wet spots or spots that look like a leak. The dealer which I purchased the truck stated it was a bad reservoir cap and replaced it. I noticed this when running the vehicle up to temp, it had previously started placing a coolant smell into the cab, and a slight white smoke came in. It took them a couple of days to find the issue. They changed the cap, then all ran good for 5k miles. I began smelling it again. Figure the smoke will come back soon. Could this be a symptom of something greater? When the vehicle smoked, it came through the air system on the truck and under the hood on the passenger side.