C8 problems
6/22/2022
2023 Corvette having transmission issue - rough 1 and 2 shifting, lurching of car.
TL;DR - TSB (Technical Service Bulletin) covering issue #21-NA-033 and
service information document #5501043.
Codes P0700, P2853, P2855, solution is to flush hydraulic
transmission system and possible higher paths in hydraulic system.
See details below
Riverside Chevrolet
10AM:
Took delivery of my 2023 Corvette 3LT with Z51, front end lift with 4 miles.
Traded in my 2016 C7 1LT with 54K miles.
5PM:
Drove up to Buellton Chevron 209 miles (stops in between with no issues at Malibu Beach, Oxnard).
As I pulled up to gas pumps, the car stalled. I restarted, pulled up to pump and filled up.
When I restarted the car, it started in D2. I tried to shift D1 and it fell like the clutch was
slipping. I tried to enter M1 but got M2 instead. Back to Drive and I got D2, not D1.
The display said 'Idle creep temporarily disabled'.
Meanwhile the car was lurching everywhere, I was afraid I was going to get a runaway
situation so I turned off car and called GM Roadside Assistance.
At this point, I have been the proud owner of my car for a whopping 6 hours from new.
Not expected to have a disabled car so soon.
Car was disabled at Chevron in Buellton only 1 mile away from Rio Vista Chevrolet.
But the lurching was so bad, I didn't want to risk driving the short distance on HWY 246 with
traffic going 45 MPH.
7:30PM
Tow truck towed my car there - they close at 5PM so off to hotel for the night.
Next morning I walk to dealership (Lyft and Uber - so few drivers, quicker to walk
2 miles from hotel than wait for a ride that may never show up).
8:30AM 6/23/22:
209 miles in
214 miles out
(service record has typo of 309 and 314 miles)
Rio Vista Chevrolet
They are a very small dealership and were completely swamped with cars.
They were initially unable to accomodate my car.
However, I contacted Riverside Chevrolet and their Service Advisor convinced the
Rio Vista Chevrolet Service advisor that this problem may quick fix - just either bad
firmware update or other programmatic issue.
Rio Vista Chevrolet agreed to check and found the issue (details from report below).
Concern: c/s vehicle lurches in 1st and 2nd gear
Correction scanned for codes and found P0700, P2853, P2855, searched for bulletins and
found #21-NA-033: Malfunction Indicator Lamp (MIL) Illuminated - Multiple Transmission
DTCs set - (Dec 15, 2021).
Performed Transmission Service Cleaning Procedures, Hydraulic System Flush Procedure,
and Transmission Service Fast learn with gds 2, cleared codes and test drove, vehicle
shifted normal at this time, scanned for codes and codes did not come back at this time.
1PM 6/23/22: I got the car back, started on my ~270 mile journey from Buellton, CA to
San Jose. About 2 miles from the dealer, the shifting got rough in 1 and 2 again, but no
Check Engine light. Sometime during the journey, the Check Engine light came
back on - car was still running OK and I made it home around 6PM.
6:30PM 6/23/22:
Mychevrolet app alerted me to error and recommended I take the car 'within 1 day'
for servicing.
I noticed that in Auto mode, the car was again shifting rough in 1 and 2.
Out of frustration, I used 'manual' mode and it seemed to be fine and I used that to get to
the local dealer from my home. Check Engine light was on, but no 'Idle creep temporarily
disabled' like yesterday.
11:00AM 6/24/22
Fremont Chevrolet
I gave them same data above from Rio Vista Chevrolet.
Here's their report
478 miles in
483 miles out
" Customer states Check Engine light is on.
Customer purchases vehicle in Southern Califorina.
Light came on for P0700, P2853, P2855 on the way up here and took to
a GM dealer. They performed transmission fluid flush procedure per
bulletin 21-NA-033. Transmission when in automatic has harsh shifts seems to be
OK in manual. Please check and advise"
"1. Verified customer's concern. found check engine light on.
Inspected and found current engine control module diagnostic trouble code set
P0700: Transmission control module requested Malfunction Indicator Lamp Illumination
and current transmission control module diagnostic trouble codes set
P0841: transmission fluid pressure sensor performance and
P2855: clutch 1 pressure charge performance.
Performed diagnostic as per service information document #5501043 and
Technical Service Bulletin # 21-NA-033: Malfunction Indicator Lamp (MIL) illuminated
- Multiple Transmission DTCs set - (Dec 15, 2021).
Performed transmission fluid level check procedure, fluid level OK and at
specification for non-track fill.
Checked and recorded transmission diagnostic trouble code freeze frame failure records .
As per diagnostics for transmission diagnostic trouble codes set, performed transmission
odd gear clutch hydraulic system cleaning procedure.
Procedure requires it to be performed 3 times. Performed procedure 6 times to
help flush out any possible debris. Performed line pressure hydraulic system cleaning
procedure 3 times. Performed complete hydraulic system cleaning procedure then
performed transmission fast learn procedure.
Procedure was successful. Cleared all diagnostic trouble codes, road-tested vehicle
mileage 478 to 483 miles and rechecked transmission shifting OK.
Transmission operating as designed at this time.
Customer previously had vehicle at another dealership for current diagnostic trouble codes
P0700, P2853, and P2855.
Opening GM Technical Assistance case to see what they want to be done.
---
Since receiving car back from Fremont Chevrolet, it seems to be fine as of 6/26/2022
Did the last dealer suggest a DCT filter change? On the assumption that the issues are due to debris at the solenoids, and the fact that you have had the problem twice, it would seem prudent to have the DCT filter changed out. That way you can cut the old DCT filter apart and see if there is much in the way of debris being trapped in the filter itself. If there is a lot of debris then you have done yourself a favor by avoiding the filter going into any kind of by-pass mode and plus you have a data-point for any future issues. If you remove the filter and have minimal debris then at least you have a level of confidence that there should be no issues of this nature going forward.
6/22/2022
2023 Corvette having transmission issue - rough 1 and 2 shifting, lurching of car.
TL;DR - TSB (Technical Service Bulletin) covering issue #21-NA-033 and
service information document #5501043.
Codes P0700, P2853, P2855, solution is to flush hydraulic
transmission system and possible higher paths in hydraulic system.
See details below
Riverside Chevrolet
10AM:
Took delivery of my 2023 Corvette 3LT with Z51, front end lift with 4 miles.
Traded in my 2016 C7 1LT with 54K miles.
5PM:
Drove up to Buellton Chevron 209 miles (stops in between with no issues at Malibu Beach, Oxnard).
As I pulled up to gas pumps, the car stalled. I restarted, pulled up to pump and filled up.
When I restarted the car, it started in D2. I tried to shift D1 and it fell like the clutch was
slipping. I tried to enter M1 but got M2 instead. Back to Drive and I got D2, not D1.
The display said 'Idle creep temporarily disabled'.
Meanwhile the car was lurching everywhere, I was afraid I was going to get a runaway
situation so I turned off car and called GM Roadside Assistance.
At this point, I have been the proud owner of my car for a whopping 6 hours from new.
Not expected to have a disabled car so soon.
Car was disabled at Chevron in Buellton only 1 mile away from Rio Vista Chevrolet.
But the lurching was so bad, I didn't want to risk driving the short distance on HWY 246 with
traffic going 45 MPH.
7:30PM
Tow truck towed my car there - they close at 5PM so off to hotel for the night.
Next morning I walk to dealership (Lyft and Uber - so few drivers, quicker to walk
2 miles from hotel than wait for a ride that may never show up).
8:30AM 6/23/22:
209 miles in
214 miles out
(service record has typo of 309 and 314 miles)
Rio Vista Chevrolet
They are a very small dealership and were completely swamped with cars.
They were initially unable to accomodate my car.
However, I contacted Riverside Chevrolet and their Service Advisor convinced the
Rio Vista Chevrolet Service advisor that this problem may quick fix - just either bad
firmware update or other programmatic issue.
Rio Vista Chevrolet agreed to check and found the issue (details from report below).
Concern: c/s vehicle lurches in 1st and 2nd gear
Correction scanned for codes and found P0700, P2853, P2855, searched for bulletins and
found #21-NA-033: Malfunction Indicator Lamp (MIL) Illuminated - Multiple Transmission
DTCs set - (Dec 15, 2021).
Performed Transmission Service Cleaning Procedures, Hydraulic System Flush Procedure,
and Transmission Service Fast learn with gds 2, cleared codes and test drove, vehicle
shifted normal at this time, scanned for codes and codes did not come back at this time.
1PM 6/23/22: I got the car back, started on my ~270 mile journey from Buellton, CA to
San Jose. About 2 miles from the dealer, the shifting got rough in 1 and 2 again, but no
Check Engine light. Sometime during the journey, the Check Engine light came
back on - car was still running OK and I made it home around 6PM.
6:30PM 6/23/22:
Mychevrolet app alerted me to error and recommended I take the car 'within 1 day'
for servicing.
I noticed that in Auto mode, the car was again shifting rough in 1 and 2.
Out of frustration, I used 'manual' mode and it seemed to be fine and I used that to get to
the local dealer from my home. Check Engine light was on, but no 'Idle creep temporarily
disabled' like yesterday.
11:00AM 6/24/22
Fremont Chevrolet
I gave them same data above from Rio Vista Chevrolet.
Here's their report
478 miles in
483 miles out
" Customer states Check Engine light is on.
Customer purchases vehicle in Southern Califorina.
Light came on for P0700, P2853, P2855 on the way up here and took to
a GM dealer. They performed transmission fluid flush procedure per
bulletin 21-NA-033. Transmission when in automatic has harsh shifts seems to be
OK in manual. Please check and advise"
"1. Verified customer's concern. found check engine light on.
Inspected and found current engine control module diagnostic trouble code set
P0700: Transmission control module requested Malfunction Indicator Lamp Illumination
and current transmission control module diagnostic trouble codes set
P0841: transmission fluid pressure sensor performance and
P2855: clutch 1 pressure charge performance.
Performed diagnostic as per service information document #5501043 and
Technical Service Bulletin # 21-NA-033: Malfunction Indicator Lamp (MIL) illuminated
- Multiple Transmission DTCs set - (Dec 15, 2021).
Performed transmission fluid level check procedure, fluid level OK and at
specification for non-track fill.
Checked and recorded transmission diagnostic trouble code freeze frame failure records .
As per diagnostics for transmission diagnostic trouble codes set, performed transmission
odd gear clutch hydraulic system cleaning procedure.
Procedure requires it to be performed 3 times. Performed procedure 6 times to
help flush out any possible debris. Performed line pressure hydraulic system cleaning
procedure 3 times. Performed complete hydraulic system cleaning procedure then
performed transmission fast learn procedure.
Procedure was successful. Cleared all diagnostic trouble codes, road-tested vehicle
mileage 478 to 483 miles and rechecked transmission shifting OK.
Transmission operating as designed at this time.
Customer previously had vehicle at another dealership for current diagnostic trouble codes
P0700, P2853, and P2855.
Opening GM Technical Assistance case to see what they want to be done.
---
Since receiving car back from Fremont Chevrolet, it seems to be fine as of 6/26/2022
so devastated





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Good luck and hang in there !





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Last edited by Chevy Cust Svc; Jul 20, 2022 at 09:43 AM.
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Your privacy is important to General Motors. This Privacy Statement addresses the personal information GM collects and how GM handles that personal information.
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After 15334 posts and zero likes it really is time to change this robotic, extremely annoying and useless message. They add zero benefit other than to refer you to your nearest dealership.
It arrived originally with a button that was intermittent. I wasn't going to bring it in just for that. So I waited for something to go wrong that needed to go to dealer near my home in LA, I show them the button often doesn't work. They do nothing about it and give me the car back.
A couple of months later it stopped working altogether. Again, I waited for another reason to go to the dealer. Now its obviously a problem. They say they need to order a part. 7 months go by --- nothing from the dealer. I give up on them.
So I bring it to a dealer in Vegas when I had another problem they needed to fix. 6 weeks later --- TA DA! The "part" shows up. But it took 2 entire days to repair it so my feeling is -- it was something else than the part they ordered.
Anyway, for the first time I have a working glove box and a place to put my baseball cap!
TCM - Transmission System
P073E
The Engine and Transmission System is not performing as expected. An issue has been detected in the Transmission System that transfers power from the engine to the drive wheels. You may experience reduced power or shifting issues. If the vehicle is continually driven with the check engine light on, the emission controls might not work as well, the vehicle fuel economy might not be as good, and the engine might not run as smoothly. This could lead to future repairs. Service within 1 day












