ACDelco GM Original Equipment 10-9395 Dexron VI Automatic Transmission Fluid, 1 Gallon

If a GM automatic came from the factory calling for Dexron VI, this is the fluid it was actually validated on. ACDelco 10-9395 is GM original equipment Dexron VI, the same specification the transmission engineers set the clutch friction and line pressures around, so you are not guessing whether a universal fluid is close enough. On a 6L80, 6T70, 4L60E, or any of the later GM units, running the fluid the calibration was written for is the difference between crisp, repeatable shifts and the soft, hunting feel you get when the friction numbers are off.

Dexron VI is a step up from the older Dexron generations across the board: it holds its viscosity longer instead of shearing thin, resists oxidation and foaming under heat, and keeps its friction stable over a long service interval, which is exactly what a converter clutch and a clutch pack need to stay consistent. It is also backward compatible, so you can use it as an improved replacement in older vehicles that originally called for Dexron III or Dexron II. That makes one gallon on the shelf cover a lot of ground, from a modern truck service to freshening an older unit.

A gallon is the practical size for a drain-and-fill or for topping off after a cooler-line exchange, and it is the right call any time you have a fresh rebuild or reman unit going in and you want it filled with the correct fluid from the first mile. Always confirm your vehicle actually specs Dexron VI before you fill; if it does, this is the one to run.