Huge disappointment

This has been an ongoing problem since the C6. It seems to have stopped with the 2018 C7's and does not affect all cars.
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GM Sends Letters to Selected Corvette Owners of Potential C7 Corvette Fuel Tank Leak - Corvette: Sales, News & Lifestyle

General Motors began sending letters to owners of C7 Corvettes to notify them of a potential issue with their Corvette's fuel tanks. Based on those chiming in on the forums, the notice covers Corvettes built from 2014-2017 and includes all models from Stingray to Z06.
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C SEVEN GS Bob said:
Not new - the letter was dated May of 2018. Special Coverage Program #17469. Might be Convertible only or early build cars. Mine was built in late August or early September of 2016 and I took delivery in early October 2016. I'm not worried about it but do keep a nostril peeled for gas odor.
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Got my gears going on that letter and I received one as well.
Basically saying if you do not have a problem don't worry about it. With which I have complied....having forgot about the letter
 
So, the dealership called today and after leaving the car overnight to get cold, the problem reappeared. They found the problem and will have it ready for me tomorrow. YAY!
I hope that is the end of it. I can’t remember what she said they found, but once I pick it up and get the lowdown, I shall report back.
Dale.
 
Dale124 said:
So, the dealership called today and after leaving the car overnight to get cold, the problem reappeared. They found the problem and will have it ready for me tomorrow. YAY!
I hope that is the end of it. I can’t remember what she said they found, but once I pick it up and get the lowdown, I shall report back.
Dale.
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Good news Dale.
They are normally pretty good in that service department. They have looked after my 3 corvettes and do a good job taking care of my H1 Hummer. They have some old school guys and some young guns in that shop, so a good combination.

You’re back on the Corvette high 👍
 
ddgermann said:
Good news Dale.
They are normally pretty good in that service department. They have looked after my 3 corvettes and do a good job taking care of my H1 Hummer. They have some old school guys and some young guns in that shop, so a good combination.

You’re back on the Corvette high 👍
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That’s great to hear. Thanks for your feedback. I can’t wait to get back on the road, or at least back in the garage where I can watch it any time I want on the “Vette Cam”, that I installed :D
 
Dale124 said:
That’s great to hear. Thanks for your feedback. I can’t wait to get back on the road, or at least back in the garage where I can watch it any time I want on the “Vette Cam”, that I installed :D
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We go from “nanny cam” to “vette cam”.

That’s awesome. You are right though... many of us have been caught in the garage over the winter hanging out with our Corvettes. Planning mods or trips.... the wife opens the door with the look on her face...rolls eyes and goes back in. 😂

You are not alone. 👍
 
Phil said:
by no means am i a mechanic, but its possible they filled the tank with a lower octane and THAT set off the code. not surprised in this era of tight margins and dealers trying to reduce their costs
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Wrong octane level from say 87 - 93 won't turn on the MIL BUT overfilling will. Wrong octane usage is more of a long game killer and will eventually cause misfires and a rough running engine.
Hopefully whoever filled up the car stopped at the second click of the pump and didn't "Top it up". By topping it up you can actually fill the carbon canister with raw fuel and that can be sent through to your vent shut valve and bypass. If the system cant "breathe" properly it can throw a code. After driving it for a bit the level has obv gone down and that might be why the tests are coming up problem free. Either way, nothing to worry about. Super annoying after 4 days for sure, hopefully you'll be cruisin problem free this weekend Dale.
 
Lootz said:
Wrong octane level from say 87 - 93 won't turn on the MIL BUT overfilling will. Wrong octane usage is more of a long game killer and will eventually cause misfires and a rough running engine.
Hopefully whoever filled up the car stopped at the second click of the pump and didn't "Top it up". By topping it up you can actually fill the carbon canister with raw fuel and that can be sent through to your vent shut valve and bypass. If the system cant "breathe" properly it can throw a code. After driving it for a bit the level has obv gone down and that might be why the tests are coming up problem free. Either way, nothing to worry about. Super annoying after 4 days for sure, hopefully you'll be cruisin problem free this weekend Dale.
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Actually using a low octane fuel will lead to “Detonation” or “Knock” due to compression ratios mainly. Corvettes, like some other performance cars have a high comp ratio and the detonation under load using 87 is not a long term problem. It can be almost immediate if you push it. The consequences are severe for the engine.

And of course not covered under warranty. 😞
 
Ok, I now have her back home, and all good.....I hope.
The tech hooked up the “smoke machine” after a “cold soak”, and found small puffs of smoke coming from a vent that is apparently caused by the “vent solenoid”. Replaces the “CVSV” and performed another pressure test...all good.
I sure hope that is it. Fingers crossed.
Dale.
 
ddgermann said:
Actually using a low octane fuel will lead to “Detonation” or “Knock” due to compression ratios mainly. Corvettes, like some other performance cars have a high comp ratio and the detonation under load using 87 is not a long term problem. It can be almost immediate if you push it. The consequences are severe for the engine.

And of course not covered under warranty. 😞
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That goes without saying, however its only under pretty aggressive use, you've gotta be really hot rodding it. Driving it normally will do nothing, slightly aggressive will start to ping (spark knock). Straight out of the owners manual 91 is recommended but not required, nothing less than 87 is acceptable because of detonation or HEAVY knock, Thats the engine killer. Slight pinging wont severely hurt your engine. The car can be driven normally using lower octane and cause long term carbon deposits over the span of a lot of miles, I've seen it quite a bit when customers cheap out on fuel. It just doesnt burn the way its meant to.

Now this is for base model 6.0/6.2L engines only. 7.0L engines like you said - different ball game.
You can use lower octane and drive the car, it wont set a MIL was my point thats all :^) but lets be honest, why would any corvette guy/gal not go with premium!?

Dale I'm glad they got ya fixed up and back on the road. Vent shut valves are a somewhat common evap failure on most vehicles, sorry it happened so soon on yours. Don't sweat it, doesn't mean you have a lemon.
 
Lootz said:
That goes without saying, however its only under pretty aggressive use, you've gotta be really hot rodding it. Driving it normally will do nothing, slightly aggressive will start to ping (spark knock). Straight out of the owners manual 91 is recommended but not required, nothing less than 87 is acceptable because of detonation or HEAVY knock, Thats the engine killer. Slight pinging wont severely hurt your engine. The car can be driven normally using lower octane and cause long term carbon deposits over the span of a lot of miles, I've seen it quite a bit when customers cheap out on fuel. It just doesnt burn the way its meant to.

Now this is for base model 6.0/6.2L engines only. 7.0L engines like you said - different ball game.
You can use lower octane and drive the car, it wont set a MIL was my point thats all :^) but lets be honest, why would any corvette guy/gal not go with premium!?

Dale I'm glad they got ya fixed up and back on the road. Vent shut valves are a somewhat common evap failure on most vehicles, sorry it happened so soon on yours. Don't sweat it, doesn't mean you have a lemon.
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My car has a 6.2 litre engine and the owner manual says 93 but definitely nothing under 91 or engine damage will result.
Thus I’m not relying on the computer to try and compensate for ignoring the fuel requirements for my engine.

1568251718245.jpeg
 
Keyword there - Supercharged. I guess were comparing apples to oranges. Point being you can use 87 in a base engine , drive normally, and nothing will happen.

1568252587163.png
 
Dale124 said:
Well, after only 4 days of owning my dream car, I was taking my wife to her hair salon and looked down at my display to find my check engine light was on. I didn’t notice any drivability issues, but still, I kept wondering WTF is going on already. So I dropped my wife off at her salon and promptly went to the dealership where I bought the car. My salesman noticed I pulled up and he came out to greet me. After telling him why I was there, he escorted me over to the service bay where the lady behind the counter told me there were no techs working today (Saturday) that could read the code for the error. She suggested that I enable my free trial of On Star, and they could tell me the error code associated with this issue, so I did just that. They said it was code P0455, so I passed that code along to the service lady. She checked what that code meant and said it could be as simple as a loose gas cap, among other things. Well, as we know, I don’t have a gas cap, so not likely that. She did say it appears to be nothing serious, and that it is safe to continue driving it, but it will need to come in for assessment. I have an appointment tomorrow afternoon.
I have been monitoring my blood pressure the last few months as per my doctors advice, which had been good since he put me on a low dose blood pressure medicine, but I tell you, I just knew it was high yesterday, so I check and guess what.....I was correct. It was higher than it had been in a long time. Sheesh, this issue, although seemingly minor, stressed me out.
I shall update when I learn what occurred.
Thanks for reading the rant.
Dale.
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Yes alway start on the cheapest issues. Or invest in a cheap OBDII😳🥂😷
 
Dale124 said:
Well, after only 4 days of owning my dream car, I was taking my wife to her hair salon and looked down at my display to find my check engine light was on. I didn’t notice any drivability issues, but still, I kept wondering WTF is going on already. So I dropped my wife off at her salon and promptly went to the dealership where I bought the car. My salesman noticed I pulled up and he came out to greet me. After telling him why I was there, he escorted me over to the service bay where the lady behind the counter told me there were no techs working today (Saturday) that could read the code for the error. She suggested that I enable my free trial of On Star, and they could tell me the error code associated with this issue, so I did just that. They said it was code P0455, so I passed that code along to the service lady. She checked what that code meant and said it could be as simple as a loose gas cap, among other things. Well, as we know, I don’t have a gas cap, so not likely that. She did say it appears to be nothing serious, and that it is safe to continue driving it, but it will need to come in for assessment. I have an appointment tomorrow afternoon.
I have been monitoring my blood pressure the last few months as per my doctors advice, which had been good since he put me on a low dose blood pressure medicine, but I tell you, I just knew it was high yesterday, so I check and guess what.....I was correct. It was higher than it had been in a long time. Sheesh, this issue, although seemingly minor, stressed me out.
I shall update when I learn what occurred.
Thanks for reading the rant.
Dale.
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Take it easy, buddy
With all the technology even small problems are notified which is a good thing as long as you don’t get upset
 
☝🏻This forum is sooo great … ☝🏻

It’s a great place to write and rant when something brings your blood pressure to boil at new heights.
It is a good way to de-stress, clear the conscience and lower blood pressure so that in short time … it is well behind you.

This should perhaps come with a CCF warning though, in that we can bring it right back 18 months later.

Maybe the first best thing after ranting would be to visit the Doctor
and get a higher dose of🩸 blood pressure medicine 💊 prescribed.

Cheers 🤣👍🏻
 
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