2007 Pontiac Grand Prix GT 110,650 miles.
Out: GM fluid when it was serviced at the dealer at 65,000 miles. (Car was getting a trans solenoid replaced under warranty.)
Checked the level warm, flat service, fluid was at the high side of the hash mark.
Put car on ramps,dropped pan, 20 bolts, drained 6 quarts out, pretty dark in color. Pan was pretty clean, some debris on magnet. Cleaned gasket, reused.
In: 6 quarts Valvoline Maxlife Dex/Merc synthetic. (Bought 8 since manual said drain and fill was 7.4 qts.
Took car for a drive , back in driveway, checked level warm, top of hash marks, went in to see end of football game.