- Apr 25, 2024
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Hello. Has anyone had the gas guage issue were the tank has gas but the guage suddenly goes to empty? I will put the techron in when it arrives. Does this actually work? If not what is the cost for repair. Thank you.
C6 gas guage issue
- Thread starter Fergie
- Start date
Same issue happened to my C5 last year as soon as I took it out of storage. It used to read right when i'd fill it up but when it reached about 3/8 of a tank it would drop to empty. I ordered the Techron and with as little fuel in the tank as i could (about 1/4 tank, maybe a little less) I put in a bottle then filled it up. I guess the Techron gets rid of the gunk from the fuel that builds up on the sending unit over time. Once it was cleaned off, I was good to go. I added a second bottle on the next fuel up and I have been good since. I will add another bottle after I get my first tank of fuel burned over the next while (if the weather would only cooperate here).
Fuel pump sending unit is about $200 but the installation might be considerably more, depending on wether or not you can access it without having to drop the tank.
Edit: a google search just came up with this 'This problem also occurs with early C6s, but to replace the unit on a C6 (and late-2003 to 2004 C5s) requires the removal of the whole rear drivetrain cradle to get access to the tank and fuel pump assembly."
Fuel pump sending unit is about $200 but the installation might be considerably more, depending on wether or not you can access it without having to drop the tank.
Edit: a google search just came up with this 'This problem also occurs with early C6s, but to replace the unit on a C6 (and late-2003 to 2004 C5s) requires the removal of the whole rear drivetrain cradle to get access to the tank and fuel pump assembly."
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- Apr 25, 2024
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- Thread starter
- #3
Thank you Ol Yeller . The techron should arrive in a day or two. Hope it works. Love your yellow vette. My favourite color.
- Oct 27, 2009
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I had the same problem with my C5 and I added a bottle of Techron before fall storage to eliminate the issue.
- Apr 25, 2024
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- Thread starter
- #5
Hello. Did the Techron work? Thank you.
- Apr 25, 2024
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- Thread starter
- #6
Thank you for your reply. Great info.
- Mar 4, 2020
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Seafoam does the same thing and is available at C.T.
- Apr 25, 2024
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- Thread starter
- #8
Thank you.
@Murray20c8 , Techron is more expensive and therefore, MUST be better huh?
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- Mar 4, 2020
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Seafoam worked for my tractors. Others have sworn by it. Maybe worth a shot?
- Apr 25, 2024
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- Thread starter
- #11
One Techron so far did not work. Hmm Seafoam next. Fingers crossed.
- Mar 4, 2020
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Apparently you can run the car on Seafoam. Not sure I'd do that, but it's cheaper so do it several times if needed. I had to replace the carb on my go-kart because of the ethanol in gas, but once I started using seafoam in every tank the thing runs like a charm as do my tractors.
Hope you get it straightened out!
- Apr 25, 2024
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- Thread starter
- #13
So it sounds like I could use Seafoam in a few consecutive tanks. Good need
Try it in a few tanks of fuel, hopefully it will clean the gunk off the sending unit and eliminate the need for replcement for now.
- Apr 25, 2024
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- Thread starter
- #15
Could the Low fuel /Service fuel issue cause the Service Engine light to come on? Cause now my service engine light has come on. Car runs great only 72,000kms.
- Mar 4, 2020
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Sorry, can't tell you without knowing what the code is. You need to get an OBD2 reader to tell what it's reporting.
- Apr 25, 2024
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- #17
I will do that. Thank you for taking the time to respond. Much appreciated.
Possible for sure. I don't recall if my CEL was on when I had the Issue last year.
- Apr 25, 2024
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- #19
Thank you.
- Aug 31, 2023
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You can even get it in a 4 litre can . It’s one of the automotive products that isn’t snake oil .
