C7 problems?





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The A8, particularly the earlier years before a 2019 fluid upgrade, had some problems called 'shuddering' or 'shuttering', remedied by what's called a 'triple flush', done according to a Chevy Technical Service Bulletin (TSB). Cost at GM dealers for that is around $600 to $800.
2016 and up add forward-facing cameras for great help with parking, Apple Carplay for the infotainment screen, and a soft-close pull-down for the rear hatch (if coupe).
The performance exhaust option code for all years is NPP (doesn't stand for anything, it's just the option code). This allows controlling (through a number of means) exhaust tone, plus, it adds 5HP to the LT1 engine, resulting in 460HP. NPP is a neat option; it's included as part of the Z51 package.
Grand Sport (GS) and Z06 models are the 'wide-body' cars, with slightly wider quarter panels and fender extensions to accommodate wider wheels. The have been numerous threads and reports of cracking issues with the wider wheels. Not all crack. The best long-term cure seems to be forged aftermarket ($) wheels.
There are three trim levels: 1LT, 2LT and 3LT. View these videos for descriptions of the differences -
The 3LT interior has many reports of the leather delaminating from the dashboard. The proper repair seems to cost around $3000.
Z06 models and cars with the Z51 performance package have a dry sump, larger capacity oil pan and oiling system, which has 2 drain plugs, and has seemed to baffle some dealers and/or oil change franchises that aren't aware of special requirements for checking and changing the oil. Do-it-yourself is best in this case, if possible.
Z06 models have 650 supercharged horsepower. ZR1 models (not too many of them, and only in model year 2019) have 755 supercharged horses, and most likely, a surprising price.
2018 was the lowest production year of the C7.
The infotainment screens have a history of getting 'stuck' in the up or down position. It's not that they're physically stuck, it's the internal wiring that operates the up-down chafes and/or cracks, freezing the screen in place. Repair cost around $1200 give or take.
I don't know any issues related to convertibles or manual trans cars.
OEM brake pads are very dusty, and will blacken wheels pretty quick. I, and a number of others, have switched and had great results with low-dust PowerStop Z26 pads. And if you DIY, C7 brake pads are probably the easiest to change you'll ever run into.
If the car doesn't have mud guards, add some. I like the GM accessory ones. They only stick out about 1", but add great protection.
The drive belt tensioners are known to leak/fail. A relatively easy, inexpensive part you can DIY.
If you buy one, order the build sheet and window sticker from the National Corvette Museum. Great to have! https://corvettestore.com/corvette-b...sticker-combo/
OEM tires may be 'summer only', not all-season. All-seasons are best for me, and others, for a number of reasons.
You'll need lifting pucks, but you probably already have them.
After a purchase (which should come after a pre-delivery inspection), strongly suggest get all vehicle fluids flushed.
I bought our 2015 Z51 from CarMax in December, 2021,with 12,000 miles, and bought their MaxCare extended warranty, which has already paid for itself. Suggest if you can that you buy an extended warranty.
So, while I've been typing all this, probably 15 other guys or gals have been typing the same thing!
I'll hit 'Submit' so you can at least see what my thoughts are. I'll probably think of more later.Best of luck!







The A8, particularly the earlier years before a 2019 fluid upgrade, had some problems called 'shuddering' or 'shuttering', remedied by what's called a 'triple flush', done according to a Chevy Technical Service Bulletin (TSB). Cost at GM dealers for that is around $600 to $800.
2016 and up add forward-facing cameras for great help with parking, Apple Carplay for the infotainment screen, and a soft-close pull-down for the rear hatch (if coupe).
The performance exhaust option code for all years is NPP (doesn't stand for anything, it's just the option code). This allows controlling (through a number of means) exhaust tone, plus, it adds 5HP to the LT1 engine, resulting in 460HP. NPP is a neat option; it's included as part of the Z51 package.
Grand Sport (GS) and Z06 models are the 'wide-body' cars, with slightly wider quarter panels and fender extensions to accommodate wider wheels. The have been numerous threads and reports of cracking issues with the wider wheels. Not all crack. The best long-term cure seems to be forged aftermarket ($) wheels.
There are three trim levels: 1LT, 2LT and 3LT. View these videos for descriptions of the differences -
The 3LT interior has many reports of the leather delaminating from the dashboard. The proper repair seems to cost around $3000.
Z06 models and cars with the Z51 performance package have a dry sump, larger capacity oil pan and oiling system, which has 2 drain plugs, and has seemed to baffle some dealers and/or oil change franchises that aren't aware of special requirements for checking and changing the oil. Do-it-yourself is best in this case, if possible.
Z06 models have 650 supercharged horsepower. ZR1 models (not too many of them, and only in model year 2019) have 755 supercharged horses, and most likely, a surprising price.
2018 was the lowest production year of the C7.
The infotainment screens have a history of getting 'stuck' in the up or down position. It's not that they're physically stuck, it's the internal wiring that operates the up-down chafes and/or cracks, freezing the screen in place. Repair cost around $1200 give or take.
I don't know any issues related to convertibles or manual trans cars.
OEM brake pads are very dusty, and will blacken wheels pretty quick. I, and a number of others, have switched and had great results with low-dust PowerStop Z26 pads. And if you DIY, C7 brake pads are probably the easiest to change you'll ever run into.
If the car doesn't have mud guards, add some. I like the GM accessory ones. They only stick out about 1", but add great protection.
The drive belt tensioners are known to leak/fail. A relatively easy, inexpensive part you can DIY.
If you buy one, order the build sheet and window sticker from the National Corvette Museum. Great to have! https://corvettestore.com/corvette-b...sticker-combo/
OEM tires may be 'summer only', not all-season. All-seasons are best for me, and others, for a number of reasons.
You'll need lifting pucks, but you probably already have them.
After a purchase (which should come after a pre-delivery inspection), strongly suggest get all vehicle fluids flushed.
I bought our 2015 Z51 from CarMax in December, 2021,with 12,000 miles, and bought their MaxCare extended warranty, which has already paid for itself. Suggest if you can that you buy an extended warranty.
So, while I've been typing all this, probably 15 other guys or gals have been typing the same thing!
I'll hit 'Submit' so you can at least see what my thoughts are. I'll probably think of more later.Best of luck!
Last edited by Catfish4818; Aug 27, 2023 at 11:52 AM.
The Best of Corvette for Corvette Enthusiasts





The A8, particularly the earlier years before a 2019 fluid upgrade, had some problems called 'shuddering' or 'shuttering', remedied by what's called a 'triple flush', done according to a Chevy Technical Service Bulletin (TSB). Cost at GM dealers for that is around $600 to $800.
2016 and up add forward-facing cameras for great help with parking, Apple Carplay for the infotainment screen, and a soft-close pull-down for the rear hatch (if coupe).
The performance exhaust option code for all years is NPP (doesn't stand for anything, it's just the option code). This allows controlling (through a number of means) exhaust tone, plus, it adds 5HP to the LT1 engine, resulting in 460HP. NPP is a neat option; it's included as part of the Z51 package.
Grand Sport (GS) and Z06 models are the 'wide-body' cars, with slightly wider quarter panels and fender extensions to accommodate wider wheels. The have been numerous threads and reports of cracking issues with the wider wheels. Not all crack. The best long-term cure seems to be forged aftermarket ($) wheels.
There are three trim levels: 1LT, 2LT and 3LT. View these videos for descriptions of the differences -
https://www.youtube.com/watch?v=DNEZPKvg7r8&t=28s
https://www.youtube.com/watch?v=jsFbdOuAGrI
The 3LT interior has many reports of the leather delaminating from the dashboard. The proper repair seems to cost around $3000.
Z06 models and cars with the Z51 performance package have a dry sump, larger capacity oil pan and oiling system, which has 2 drain plugs, and has seemed to baffle some dealers and/or oil change franchises that aren't aware of special requirements for checking and changing the oil. Do-it-yourself is best in this case, if possible.
Z06 models have 650 supercharged horsepower. ZR1 models (not too many of them, and only in model year 2019) have 755 supercharged horses, and most likely, a surprising price.
2018 was the lowest production year of the C7.
The infotainment screens have a history of getting 'stuck' in the up or down position. It's not that they're physically stuck, it's the internal wiring that operates the up-down chafes and/or cracks, freezing the screen in place. Repair cost around $1200 give or take.
I don't know any issues related to convertibles or manual trans cars.
OEM brake pads are very dusty, and will blacken wheels pretty quick. I, and a number of others, have switched and had great results with low-dust PowerStop Z26 pads. And if you DIY, C7 brake pads are probably the easiest to change you'll ever run into.
If the car doesn't have mud guard, add some. I like the GM accessory ones. They only stick out about 1", but add great protection.
The drive belt tensioners are known to leak/fail. A relatively easy, inexpensive part you can DIY.
If you buy one, order the build sheet and window sticker from the National Corvette Museum. Great to have! https://corvettestore.com/corvette-b...sticker-combo/
OEM tires may be 'summer only', not all-season. All-seasons are best for me, and others, for a number of reasons.
You'll need lifting pucks, but you probably already have them.
After a purchase (which should come after a pre-delivery inspection), strongly suggest get all vehicle fluids flushed.
I bought our 2015 Z51 from CarMax in December, 2021,with 12,000 miles, and bought their MaxCare extended warranty, which has already paid for itself. Suggest if you can that you buy an extended warranty.
So, while I've been typing all this, probably 15 other guys or gals have been typing the same thing!
I'll hit 'Submit' so you can at least see what may thoughts are. I'll probably think of more later.Best of luck!
Great sticky threads at the start of the C7 General Discussion. Here are a couple -
https://www.corvetteforum.com/forums...cking-etc.html
https://www.corvetteforum.com/forums...uncements.html
The one below, and all the 'Decoding VIN' threads are great. If you only know the VIN, you can identify year, model, trans type, trim level, Z06, Z51, GS, etc.
https://www.corvetteforum.com/forums...16-c7-vin.html
My personal preference is for 2LT. It includes memory seats and steering wheel, heated and ventilated seats, a bit of extra interior trim, driver's sunvisor with buttons to control your garage door opener, and other items I can't recall just now. I myself would not want a 3LT for the dashboard issues, even though not all are affected, and likely never will be.
I should have added about the infotainment screen wiring failure that a more common symptom is the screen will stay up, but go dark. You can't see your audio controls, navigation screen (if equipped), settings controls, and more.
Regarding the tires, if the car has the original Michelin summer only run-flat tires, there will be a perfectly normal sound when making tight turns (forward or reverse) due to this:
https://www.mcgrathautoblog.com/auto...ette-stingray/
That Ackerman sound is perfectly normal. Make it go away by using all-season tires. I used Michelin AS/4 tires, run-flats. They give a much quieter ride than the summer-only, and no Ackerman noise.





Check at mychevrolet.com the extended special warranty for this issue.
To check if you Corvette is effected (meaning you will soon get ‘the letter’), or if would want to know right now whether your car will be part of this repair program, if you not already done so register your car at chevrolet.com, enter your VIN, and you will see if they added the 10yr/120K mile Special Coverage Program # 17469 to it. Or call Chevrolet Customer Assistance Center...
*C7 Corvette is covered up to 120,000 miles or up through December 15, 2024 (10 years);
*Chevrolet is calling this an extended service warranty;
* It covers the left side fuel tank and attendent parts, including the primary fuel pump, though is primarily for cracks on the top of the tank itself;
* Symptoms include: check engine light; smelling fuel vapor; and/or fuel leaks on the surface below the car.





I went from a series of C5s before I got my current C7. I really liked the C5s, but I can attest that the C7 is just a superior car - performance wise, comfort wise, build quality wise, etc. Not knowing your budget, the newer C7s have more options than the older ones, but they are all excellent cars. I suggest you study what was available on each model year in terms of standard equipment and options, then try and test drive an example of a number of model years and see what really fits your needs/desires.
Good luck in your search.
















