Engine still running

So yesterday I noticed that when I got out of my car 2012 Chevrolet Equinox that the engine was still running even though I took the key out but nothing else was on no lights radio etc. it ran for between a minute or two and then turned off on it’s own. Does anyone know what could cause this?

Does the car have a turbo?

Does it have remote start? Are you sure it’s not the engine cooling fan running after engine shutdown?

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It does not have a remote start. Also I’m not sure but I’ve never noticed it before that’s what threw me off.

Not that I’m aware of

Then I don’t know what the problem is if it had a turbo it could be turbo spin down timer.