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2011 Equinox 1LT V6 3.0L
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One thing I read gave me a little pause. For folks who wait a bit too long to drain/fill . . . I read that it may be best to leave 15% to 20% old fluid in the transmission as it contains clutch material that will help worn clutch plates from slipping. Apparently, some have slipping issues when all the fluid is completely replaced in a transmission that has a lot of miles or went too long to replace the fluid. So by leaving some old fluid in it, the clutch residue helps provide some grip.
Yeah - I heard this same story back around 2002, with my '97 Taurus. I had driven it hard up and down the East Coast for 4 straight years ('98 - 2002) and over 100,000 miles, never changing the transmission fluid. This vehicle has no drain plug ... have to remove the 24-bolt pan ... very messy. Anyway, I posted on the Ford forums and was told to only replace what was in the pan; *NOT* to completely transfuse it (because the old fluid was needed to keep it from failing, etc.). I didn't buy the reasoning and went ahead with the complete transfusion anyway (dropped the pan, pulled the lower cooler line, pumped it out until "low flow", overfilled by 6 quarts, pumped it out the cooler line *again*). This procedure worked perfectly: on the 2nd pump-out, I had multiple empty quart containers all lined up and my extension hose coming from the lower cooler line filling each empty container one after the other. Right on cue, while filling the last empty quart container, the black fluid turned to red! So I had performed a complete transfusion of the fluid!

Then I drove the car. The transmission shifted very smoothly, but kind of vaguely. About 400 miles later, the Check Engine Light came ON with a Torque Converter Code (1700-series, IIRC) "Excessive Torque Converter Clutch Slippage Detected". Now, I would've blamed it on the fluid transfusion - had it not been for the fact that this code had already appeared previously. Offhand, without looking at my records, I don't know how often ... but probably just once or twice.

Thinking I was now heading for a transmission rebuild, I got a few quotes for the work. But it took me several weeks to do that, during which time I was still driving the car, being very careful how I accelerated from a stop (so as to not "slam" the transmission going from 1st to 2nd gear). After a few months had gone by, I decided I didn't need a transmission rebuild, and proceeded to drive the car to 226,000+ miles. As for the code - it disappeared along the way, and didn't come back.

So the transfusion may have created a "temporary" situation, but it wasn't a "terminal" one.

That said, I'm also not advocating for changing transmission fluid every 100,000 miles, although that's pretty much what I did with my Nox (LOL!). I really think the health of your cooling system plays a part in the longevity of your transmission fluid. My Gen-3 Taurus suffers from the notorious cooling system 'gunk up'. Bad Heat Transfer Fluid (coolant/anti-freeze) is going to result in burned transmission fluid. If you keep your cooling system fresh, I think you probably *can* change the fluid less often (at least on the vehicles where there's a pan, making it a more difficult job).
 
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There is a GM transmission oil dip stick, GM no. 2422-5190 and named "Indicator ASMTRANS Fluid LVL". Anybody tried it--looks like it will fit in my 2010 4-cyl just fine. GM Parts Giant shows it as a fit for my Nox.
 

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2021 Equinox LS AWD 1.5T
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I plan to change my fluid every 30,000 miles. The manual recommends 45,000 for severe service. Several years ago, I was informed by Chevrolet Customer Service that our climate here in Michigan is considered to be severe service. I have the 6-speed transmission in my new Equinox, which is the same trans as my previous Malibu. Apparently there is a TSB advising against the Bosch power flush machine, so it's drain-and-fill only these days. Since that method only removes 40 or 50% of the fluid, I will do it frequently and always keep it clean.
 

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Did a drain/refill on my Traverse 500 miles ago.
Traverse
50,464
50,883
79,147
79,657
80,441
100,000
110,000
128,000
140,000
160,000

Im due for a drain on the Equinox were at 97K. Im due for an oil change in about 1000 miles...
I wonder if I should do the trans at a nice round number- 100,000.

38,724
40,827
46,286
66,438
74,571
 

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Do it at 30k. I did my '16 AWD at 45k and factory fluid was black. Changed it again at 75k and the Amalie full synth. fluid I put in was still red. That tells me GM factory Dex. is garbage.
 
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I’m planning on doing my first drain and fill on my ‘16 2.4L Terrain next weekend, I’m at 58k and this would be the first change. I have 6 qts of Valvoline Dexron VI, will this be enough for a drain and fill? Thanks.
 

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Yea I did mine the other day... It actually started coming out of the overflow at less than 5 quarts I had 7 on hand because last time I did it it didn't even come out of the overflow after 6 quarts... Depends I guess.
 

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I did my '16 AWD at 45k and factory fluid was black....That tells me GM factory Dex. is garbage.
I agree 1000%. My 'Nox just rolled 10K miles and I decided to replace the factory fluid with Valvoline Full Synthetic Dex VI. I plan to perform two drain-and-fills now, and repeat every 30K going forward. I did my first drain-and-fill yesterday and drove 100 miles today. Wow! What a difference in shift quality! Much smoother! I wasn't expecting a difference because my factory fluid was still clean and clear (only slightly darker than new fluid). My transmission had a slight shudder in the lower gears since it was new. That is gone now. I am sold on full synthetic Dex. I plan to do my second drain next weekend after a few hundred more miles.

I have 6 qts of Valvoline Dexron VI, will this be enough for a drain and fill?
I have the 6-speed and I performed the cold drain-and-fill method...about 4.5 quarts.
 

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I changed the transmission fluid along with the rear wind and transfer case this morning, what a difference in the way the transmission shifts now!

My only question is I follows the procedure but when I removed the fill plug before draining there was fluid coming out steady, not just a drip. I drained about 4.5 qts but the refill only took 4 qts.

Has anyone refilled with less than they drained? Thanks.
 

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I have never used those side level plugs in the many FWD GM pan less or dipstick less trans. I've owned over the years.
In a non leaking trans. I've put back in what I've drained out as it's impossible to get the vehicle level enough without being on a lift never mind getting fluid up to the recommended checking temperature.
I'd put the half qt. in myself.
 
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Yea u need to have the motor running after you drain and put in the drain plug start the car with just the overflow open add fluid till it comes out of the overflow and insert the bolt when the motor is running... If you have the car off the torque converter will be bleeding out and u will end up with less fluid when u start it...
1. Engine off...drain and then insert drain plug.
2. Remove overflow plug start car add fluid till it dribbles out and re insert plug.
I suggest doing a couple drain and fills anyways.
 
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