6L90 fluid extraction ... on a sloped driveway

[CheezWhiz]

2016 2500HD. I have done a couple changes with an extractor, I get about 3 quarts out. Those were done with the truck parked on an incline facing uphill.

Question - if I turn the truck around so that the truck is facing downhill, am I likely to get any more fluid out?

 

[apollo18]

doesnt hurt to try, i heard trannys can basically run low on fluid at idle so i doubt it would damage anything when u reverse it to face it diff way

 

[Oro_O]

Probably not. The tube inserts roughly mid-pan (take a look at it or a pic). Doing it on level ground is likely best.

 

[Snagglefoot]

I have the same transmission and on level ground using a vacuum and 3/8 inch OD plastic tubing through the transmission dipstick tube, all I can get out is 1-1/2 quarts. It’s a 2008 3/4 ton Suburban. I believe the tube hits the top of the transmission filter.

 

[CheezWhiz]

Ok thanks all. Level ground isn't really an option. I will probably give it a shot just to see how it goes, maybe I'll even do the right thing and report back!

 

[wpod]

Jack up the truck so it is level.

 

[JeffKeryk]

What is the normal drain? Compare that to the 3 qt extraction.