When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
This is my same thoughts....... I would buy one, but I need to see the proper GM procedure spelled out in detail of WHAT to do, and HOW to do it step by step.
For those who have bought one, PLEASE post your findings from using it.
Is it user friendly? Do I need to have an advanced Computer Science Degree to operate it?
I watched the flush done twice by a great C8 Trained Tech. He showed me what the GM Service procedure said on his PC, i.e. simply the Flush gets debris into the filter housing and filter prior to a filter change.
This last one in August, I watched the full ~10 minutes while he started the engine and the GM Service Computer increased the engine rpm to 2000 with the car in Neutral. It stayed at 2000 for the procedure. Frankly all I saw this time on his PC as he sat in my seat was a bar moving across the bottom saying it was doing itis thing! No mention of what that was. If I asked him, frankly as good as he his, doubt he knows.
We can speculate it was cycling the solenoids for the many hydraulic servos like the shift forks for each gear. Was the fluid flow reversed?? There were no visible gear changes but was it like a normal standard trans were the clutches were activated and it ran thru each gear??
So bottom line I have not seen anyone post what the GM process does so hard to say what is right for this one!
^^^^ Yeah Jerry, I too watched my C8 get its flush at the dealer when the initial free filter changed happened 2 years ago. As you said, the car ran and a higher RPM and the laptop was hooked up and it did its thing for about 10 minutes.
I didn't get to see what his laptop showed, or if it gave him instructions on step by step what to do, and in what order. I watched from 40 feet away.
I would just like to see if the GM SERVICE MANUAL states how to do this...... perhaps that's what Andybump showed above.
Still, looking at this new aftermarket tool, I read through about everything shown on the Amazon listing. All I saw was that it showed Transmission capability..... was HOPING that it would have spelled it out more clearly that it will do the active Hydraulic Flush procedure. Has anyone tried this yet?
Updating the tool is easy. Hook up to USB, connect it to your WIFI, it'll find updates and let you choose them and download.
By the way, this tool isn't strictly GM-only. I used the "mall" button and downloaded full system diagnostics for my hyundai for just $30 more. Seems to support all brands. Amazing what you get for $150.
I do not understand why the transmission isn't apparently catching all debris during normal operation, but it is what it is, and we have a way to do the flush without paying a fortune.
How do we go about acquiring a printed copy of the Service Manual?
In the Owner's Manual. Helm inc. You can also access Helm inc on line. Looks like maybe Alldata provides access to it - I know nothing about it though.
Ebay has them sometimes - they are not necessarily up to date - I do not know about the validity of the pedigree for ebay versions.
In the Owner's Manual. Helm inc. You can also access Helm inc on line. Looks like maybe Alldata provides access to it - I know nothing about it though.
Ebay has them sometimes - they are not necessarily up to date - I do not know about the validity of the pedigree for ebay versions.
Thank you. Don't have my car yet, as its on hold in BG waiting on an option apparently on constraint after GM accepted my order. Since I don't have the car, I don't have a user manual yet. This is helpful, thanks.
The Helms website is only showing User Manuals for the 2023 and 2024 Corvette.
Thank you. Don't have my car yet, as its on hold in BG waiting on an option apparently on constraint after GM accepted my order. Since I don't have the car, I don't have a user manual yet. This is helpful, thanks.
The Helms website is only showing User Manuals for the 2023 and 2024 Corvette.
You can go here to download the Owner's Manual right now.
I see they have the service manual for 2021, for $349. Has anyone bought the manual from Helm? I've seen so many halfazzed manuals that I'm hesitant. "Back in the day" you knew you were getting an official factory service manual, like what the techs supposedly referred to.
I see they have the service manual for 2021, for $349. Has anyone bought the manual from Helm? I've seen so many halfazzed manuals that I'm hesitant. "Back in the day" you knew you were getting an official factory service manual, like what the techs supposedly referred to.
Helm IS the official source for GM and many other Manuals. From their 2020 C8: Price: $475.00In Stock2020 Chevrolet Corvette Service Manual Set Contains Factory Authorized Service information written by General Motors. It contains Diagnostic Information and Procedures, Schematics and Routing Diagrams, Component Locator, Repair Instructions, Description and Operation, Specifications, and Special Tools and equipment. Service information on HVAC, Body & Accessories, Restraints, Steering, Suspension, Driveline/Axle, Brakes, Engine and Transmission/Transaxle.
The PC version is $329.
I have the 4 volume C7 printed manuals. Each is 8 1/2 X 11 and ~2 inches think. However it tells a tech what to do not necessarily just what a Flush is doing. Mine has some cryptic info on for example transmission operation but not a great deal of detail. It's meant for a Chevy Tech (or DIYer) to work on an item NOT design it!
I watched the flush done twice by a great C8 Trained Tech. He showed me what the GM Service procedure said on his PC, i.e. simply the Flush gets debris into the filter housing and filter prior to a filter change.
This last one in August, I watched the full ~10 minutes while he started the engine and the GM Service Computer increased the engine rpm to 2000 with the car in Neutral. It stayed at 2000 for the procedure. Frankly all I saw this time on his PC as he sat in my seat was a bar moving across the bottom saying it was doing itis thing! No mention of what that was. If I asked him, frankly as good as he his, doubt he knows.
We can speculate it was cycling the solenoids for the many hydraulic servos like the shift forks for each gear. Was the fluid flow reversed?? There were no visible gear changes but was it like a normal standard trans were the clutches were activated and it ran thru each gear??
So bottom line I have not seen anyone post what the GM process does so hard to say what is right for this one!
Which begs the question - has anyone actually tried the linked Amazon product to see if it does something similar as indicated here? Increasing RPM, etc?
I would love nothing more to be able to fully do my own maintenance on the C8, but the DCT flush procedure is big limiter right now. I'm sort of shocked there hasn't been one of the legit C8 aftermarket companies come up with a solution yet.
Which begs the question - has anyone actually tried the linked Amazon product to see if it does something similar as indicated here? Increasing RPM, etc?
I would love nothing more to be able to fully do my own maintenance on the C8, but the DCT flush procedure is big limiter right now. I'm sort of shocked there hasn't been one of the legit C8 aftermarket companies come up with a solution yet.
My point was how would you know since we don't know what the GM Service Computer is doing! Yep it takes ~10 minutes with the car running in neutral. It brings the rpm to 2000 for that 10 minutes. When finished it says finished!
Got it thanks. Any whereabouts for the legit Service Manual?
Like @JerryU said, Helm is the source for the legit manual. If its not there yet, I think that means it is not available to the public yet, for whatever reason. I believe that back in 2020, those were not yet available on helm. You could call the number in the manual - it is still Helm, and ask when it will be available. Alldata does not list them either for 2023-2024.
This is my same thoughts....... I would buy one, but I need to see the proper GM procedure spelled out in detail of WHAT to do, and HOW to do it step by step.
For those who have bought one, PLEASE post your findings from using it.
Is it user friendly? Do I need to have an advanced Computer Science Degree to operate it?
This is what I was referring to by saying I'm chicken. We don't know if the scan tool automatically runs the engine up to 2k RPM or what. We don't know if the scan tool gives the prompts to proceed etc. I'm not dissing this in the least, but I need a step by step before I will try it.
Bought this Launch Creader understanding that it would be a bi-directional OBDII monitor with brand-proprietary code support for one brand, can add software modules supporting other brands after purchase. While all that is true, what they don't tell you is that software supporting ANY outgoing commands (like Reset Brake Module) are in-app purchases at $34.04US/yr EACH. Each of the advertised 16 "Calibration Functions" (using outgoing commands) appear to require a $34.04 per year subscription. All software add-ons (for additional brands or outgoing commands) cost $34.04 per year. Maybe acceptable for a shop, but not so good for an individual owner. To make things worse, for Brake Reset I've not been able to find any Toyota Model Coverage other than "GQTOYOTA" and "YQTOYOTA" for which I can find no definitions. Will this module work for my Tundra? To send them a message requires giving an "Alipay" (suspect this is an Alibaba payment account number) so no messaging for answers. Except for the wobbly Type C USB connector (for out of vehicle power) the unit is nicely made, basically a rubber boot around a tiny tablet with a rugged looking cable and OBDII connector. But for the shade tree mechanic you probably should look elsewhere. Like some online games the purchase cost is just the price of entry, and the annual nickel-and-dime charges will never stop. You will probably be paying $34.04 every time you use this thing. I will probably send mine back.
Bought this Launch Creader understanding that it would be a bi-directional OBDII monitor with brand-proprietary code support for one brand, can add software modules supporting other brands after purchase. While all that is true, what they don't tell you is that software supporting ANY outgoing commands (like Reset Brake Module) are in-app purchases at $34.04US/yr EACH. Each of the advertised 16 "Calibration Functions" (using outgoing commands) appear to require a $34.04 per year subscription. All software add-ons (for additional brands or outgoing commands) cost $34.04 per year. Maybe acceptable for a shop, but not so good for an individual owner. To make things worse, for Brake Reset I've not been able to find any Toyota Model Coverage other than "GQTOYOTA" and "YQTOYOTA" for which I can find no definitions. Will this module work for my Tundra? To send them a message requires giving an "Alipay" (suspect this is an Alibaba payment account number) so no messaging for answers. Except for the wobbly Type C USB connector (for out of vehicle power) the unit is nicely made, basically a rubber boot around a tiny tablet with a rugged looking cable and OBDII connector. But for the shade tree mechanic you probably should look elsewhere. Like some online games the purchase cost is just the price of entry, and the annual nickel-and-dime charges will never stop. You will probably be paying $34.04 every time you use this thing. I will probably send mine back.
The plot thickens, good information. Like I said, when someone goes from start to finish and reports what needs to happen, I'll consider it.
Thanks, but that brought up as many questions as it answered. I'm OK with paying for a $30 subscription for say the two directional functionality to do the flush, but not clear on which model. What does the $1,700 Launch tool do that the $159 doesn't? Must be a lot, but if I don't need it I won't buy it.
Thanks, but that brought up as many questions as it answered. I'm OK with paying for a $30 subscription for say the two directional functionality to do the flush, but not clear on which model. What does the $1,700 Launch tool do that the $159 doesn't? Must be a lot, but if I don't need it I won't buy it.
The cheap one does what I need, AFM/NPP exhaust valve relearns and now the DCT hydraulic flush procedure, without any additional fees or subscriptions.
The cheap one does what I need, AFM/NPP exhaust valve relearns and now the DCT hydraulic flush procedure, without any additional fees or subscriptions.
Well that's a good value then. So the tool will take control of the ECM and run the RPMs up to 2,000 and do the flush without any intervention from you? (other than you telling it to perform the flush procedure)
