[Papa Rad17]

Despite how much people like us hate it, GM wasnt entirely crazed when they made the sealed system. Unless your leaking fluid (I assume you've cheaked around seals and for puddles) then it should be perfectly fine. Majority of the time your fluid will be right on level due to how its made. Regular flushes and servicing should not however be neglected. If the trans is not slipping and hanging onto gears then I wouldnt think you have a problem. Hanging onto gears a bit when its cold isnt necessarily bad, depending on what the computer sees of course, its trying to warm things to running temperature. automatic transmissions are very temperamental and more effected by weather in my experience. IMO you would be wasting your time checking it, if you feel like there is a problem go ahead with the flush/filter and fill to exactly OE spec and go from there.