To double drain and fill or not?

[MurkyAsparagus]

Recently bought a ‘23 Chevrolet Blazer w/ 9T60. It’s coming up on 30k miles, where I intend on servicing the transmissions.

No external filter, just a small internal one. So, I will be doing just a drain and fill. With being low miles, should I do a single drain and fill or a double. I will be switching to a full synthetic Dexron VI rather than OEM Blend. For the next services, should I continue with only single drain and fills after getting all the break in fluid out?

 

[JavierH19]

With just 30k one spill is fine. I'd only do two or more on something that has dark fluid. I'd do a single spill and fill afterwards. I've never done two on any vehicle I bought and maintained since new just used ones with dark red fluid.

 

[MurkyAsparagus]

With just 30k one spill is fine. I'd only do two or more on something that has dark fluid. I'd do a single spill and fill afterwards. I've never done two on any vehicle I bought and maintained since new just used ones with dark red fluid.

I was thinking the same thing, thanks!

 

[BHopkins]

A single drain and fill will be fine, particularly if you plan on staying on a 30k service interval for the tranny. You are doing better than most on servicing a transmission, with 60k service being quite common, and even without regular services, GM transmissions tend to last a long time on the original factory fill.

 

[SevenBizzos]

At 30k ATFDFI, once is enough.

 

[barkingspider]

Drain and fill is plenty good

 

[CharBaby]

It’s good to see that you’re doing the drain & fill at ~30K miles; way to go!
To me, 30K is not early as some techs/dealers may think, it’s on time IMO.
And every ~30K from here on. I typically want to change the filter(s) on the 3rd spill & fill.
Keep up the good work.

 

[JeffKeryk]

Some say the 1st service is important as it removes break-in materials. I would just do a single spill-and-fill.