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Hi. I own a 2010 Chevy equinox (117.000 miles) 1 year ago. I was worry about the transmission fluid because I didn't have any record of service from the last onwer. I know that making a full change or flush of the ATF fluid could damage the transmission if this kind of service was not done before. I was inclined to make a progressive change instead replacing part of the fluid every week. After making a research, I saw several videos that show this process with a manual pump introducing a small hose where the cap is, but in this case was very challenging because none of the hose that I tried was able to reach the fluid. Finally I could make the job using this 3mm silicon hose:
And this big syringe to pump out the fluid:
The hardest part is trying to find the right way to introducing the hose, I found that it must be directed to the left, making slow movements and no pushing too hard (because the hose could stuck inside) the key is pushing up and down, so you can feel that the hose is moving smoothly. After the half of the hose inside, I placed the other end in my mouth making some vacuum in order to feel when the hose touch the fluid.
After that, just use the syringe to make the job being careful about the quantity of fluid extracted ( you must fill the same quantity)
The pictures of the process are above:
In the next change I will try to make a video to illustrate the process.

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And this big syringe to pump out the fluid:

Amazon.com: 300ml Large Plastic Syringe with 32.8 Feet Handy Tubing for Scientific Labs, Watering, Refilling, Filtration, Motoring Application, Set of 1 : Industrial & Scientific
Buy 300ml Large Plastic Syringe with 32.8 Feet Handy Tubing for Scientific Labs, Watering, Refilling, Filtration, Motoring Application, Set of 1 on Amazon.com ✓ FREE SHIPPING on qualified orders
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The hardest part is trying to find the right way to introducing the hose, I found that it must be directed to the left, making slow movements and no pushing too hard (because the hose could stuck inside) the key is pushing up and down, so you can feel that the hose is moving smoothly. After the half of the hose inside, I placed the other end in my mouth making some vacuum in order to feel when the hose touch the fluid.
After that, just use the syringe to make the job being careful about the quantity of fluid extracted ( you must fill the same quantity)
The pictures of the process are above:
In the next change I will try to make a video to illustrate the process.