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Old Apr 12, 2026 | 07:52 PM
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Default Triple Flush

Hi
2016 auto

How can l tell if I have had a triple flush?

My car also runs on 8 cylinders all the time. I do have the range device but it’s not plugged in.

any ideas?

the person who sold me the car gave it to me but had no clue what it was. The place where the range should
be was empty.

Any thoughts?
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Old Apr 12, 2026 | 08:15 PM
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I did the triple flush on my new to me 17 GS right after I bought it. I had the Chevy dealer that I bought it from check their records and it was never done. I also spoke to the original owner and he confirmed. I bought the tranny fluid from Amazon and brought it to the Chevy dealer. Saved a bunch on that since they upcharge the fluid. Glad I had it done. Won't have that shudder or torque tube issue hopefully. As for the range device, it plugs into the OBD 2 port near the hood release. As far as I know, that is the only way to keep an auto in 8 cylinder mode all the time. Perhaps there is a fuse to pull that also does that. Not sure. Hope that helps.
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Old Apr 12, 2026 | 08:15 PM
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Call your local dealer service department and ask for a VIS report. If the triple flush is NOT listed on the VIS, then I would strongly advise you to get it done. I am getting my 2016 Triple Flush done in a couple weeks with 43k miles.
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Old Apr 12, 2026 | 11:23 PM
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My Chevy dealer said they recommend the triple flush at 50,000 miles. That was when I had an A8. Now I have an M7 and I had that flushed and refilled.
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Old Apr 13, 2026 | 12:34 AM
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If it stays in 8 cyl. mode without the range it may well have had a tune for it. If in doubt-triple flush. I did it my self and found 3 flushes I only used 18 qts. so did a fourth to use the 24 qts. I was getting that slight shudder and now it's gone.
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Old Apr 13, 2026 | 01:39 AM
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The Range Device or a tune will take care of the AFM issue to some degree by keeping it in V8 mode. The Triple Flush is a completely different deal. If you have a C7 with the A8 and the transmission was built before 2/1/2019, then the car needs to have the Triple Flush to get rid of the old fluid to avoid likely transmission damage. As noted above, have a VIS report pulled by the dealer and get it figured out.
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Old Apr 13, 2026 | 07:19 AM
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The 'correct' triple flush ATF fluid was not available until after FEB 1, 2019.

And it's the Mobil1 'Blue label' ATF.
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Old Apr 13, 2026 | 08:09 PM
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Default Triple flush or tune?

In this thread a tune was mentioned and it might be my answer why my engine stays in V8 all the time .
Also the the v4/v8 icon is never on.
My OBD is empty, should l check to see if a fuse was pulled?
l have been going crazy trying to figure this out.
thanks
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Old Apr 13, 2026 | 08:54 PM
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Originally Posted by Kingman99
In this thread a tune was mentioned and it might be my answer why my engine stays in V8 all the time .
Also the the v4/v8 icon is never on.
My OBD is empty, should l check to see if a fuse was pulled?
l have been going crazy trying to figure this out.
thanks
You have to switch to it in one of the gauge options.
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Old Apr 14, 2026 | 12:34 PM
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Originally Posted by Kingman99
In this thread a tune was mentioned and it might be my answer why my engine stays in V8 all the time .
Also the the v4/v8 icon is never on.
My OBD is empty, should l check to see if a fuse was pulled?
l have been going crazy trying to figure this out.
thanks
There is NO fuse that controls the AFM. Only two ways that I know of to control AFM - Range or a tune.
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Old Apr 14, 2026 | 04:35 PM
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Default Triple Flush

So if my OBD IS empty and my dash does not show v4/v8 then l will assume my vette had a tune. I will the next time l go to my dealer
l will ask for a VIS report

thanks

ps l will wind up selling my range which is connected to a window valet
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Old Apr 14, 2026 | 04:36 PM
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Just a quick question as I am getting my flush done next week, will the filter also be changed as part of this or will I have to request that be done as well?
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Old Apr 14, 2026 | 04:44 PM
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I had a single flush after the guy pumped it out. The fluid looked good and smelled good with no shavings. So I didn't need a new filter.
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Old Apr 14, 2026 | 04:46 PM
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Originally Posted by Kingman99
So if my OBD IS empty and my dash does not show v4/v8 then l will assume my vette had a tune. I will the next time l go to my dealer
l will ask for a VIS report

thanks

ps l will wind up selling my range which is connected to a window valet
No. You have to get to the right menu. Mine will show V8 consistently since it was tuned. Before, it could show V4 and switch to V8.

I would dump the Range unit and get it programmed professionally.
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Old Apr 14, 2026 | 04:47 PM
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Originally Posted by Vader_C5
Just a quick question as I am getting my flush done next week, will the filter also be changed as part of this or will I have to request that be done as well?
What does the quote say? I would read it carefully and make sure it says what you see from the TSB.
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Old Apr 14, 2026 | 04:49 PM
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Originally Posted by jhopper408
I had a single flush after the guy pumped it out. The fluid looked good and smelled good with no shavings. So I didn't need a new filter.
Can you also smell moisture? AFAIK, THAT was the issue. The old fluid is hygroscopic and it sucks up moisture and eventually becomes a problem.
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Old Apr 14, 2026 | 05:46 PM
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Originally Posted by Kingman99
So if my OBD IS empty and my dash does not show v4/v8 then l will assume my vette had a tune. I will the next time l go to my dealer
l will ask for a VIS report

thanks

ps l will wind up selling my range which is connected to a window valet
A tune does not get rid of the V4/V8 indication. Change to Econ or a different mode.
How is your range device connected to a window valet? That makes no sense.
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Old Apr 15, 2026 | 09:08 AM
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Originally Posted by Kingman99
Hi
2016 auto

How can l tell if I have had a triple flush?

My car also runs on 8 cylinders all the time. I do have the range device but it’s not plugged in.

any ideas?

the person who sold me the car gave it to me but had no clue what it was. The place where the range should
be was empty.

Any thoughts?

the range is labeled GTMOTOR IT IS plugged into Top Down Tech window valet l had this in my C5 so it works

l will try all the different combos
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Old Apr 15, 2026 | 09:40 AM
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Originally Posted by Vader_C5
Just a quick question as I am getting my flush done next week, will the filter also be changed as part of this or will I have to request that be done as well?
I don't remember whether a new filter was part of the deal. I would ask to make sure. It doesn't make much sense to me to put a contaminated filter on a transmission with brand new fluid in it. It would be like taking a shower and putting on skid marked underwear.
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Old Apr 15, 2026 | 10:18 AM
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Originally Posted by TxLefty
I don't remember whether a new filter was part of the deal. I would ask to make sure. It doesn't make much sense to me to put a contaminated filter on a transmission with brand new fluid in it. It would be like taking a shower and putting on skid marked underwear.
I don't think it was mentioned in the TSB. Regardless, it should be on the DETAILED QUOTE if you demand it. They are pretty good ad "dumb it down" for the customers. Sometimes, they will highlight the total amount in case you can't understand it.
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