On a 2019 GMC Yukon xl denali 6.2 10 speed Transmission - Does it sound correct that GM recommends a Drain and Fill and not a "Flush"?

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On a 2019 GMC Yukon xl denali 6.2 10 speed Transmission - Does it sound correct that GM recommends a Drain and Fill and not a "Flush"? Does the Crossmember have to be take out? Really? Tks
 

Big Mama

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here’s a thread.

 

Marky Dissod

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If the 10L80 is suffering no drivability symptoms, then a drain & refill is reasonable.
I'm sure someone knows how to push more ATF out so that more fresh ATF can be put back in vs a simple pan drop.

(How many miles? The more miles, the more badly you want a flush.)
 

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