2000 C5 covertible
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Joined: May 2016
Posts: 55
Likes: 2
From: Lewes Delaware
2000 C5 covertible
Driving home last night fuel gauge read half tank. Suddenly check gauges comes on and then low fuel. Put another $20 high test in this morning. When starting car gauge Flys over to full then drops to empty. Odometer reads miles 57, 053 for a minute then low fuel light comes on. Tank is close to being full now. Not sure if something needs to be recalibrate or what. Help please. Thank Ingrid
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Joined: Apr 2013
Posts: 5,046
Likes: 1,160
From: Oregon
St. Jude Donor '14-'15-'16-'17-'18-'19-'20-'21-'22-'23
Ahh the gas gauge problem strikes again alot of C5's get this.. Try some Techron it my help you...
https://www.corvetteforum.com/forums...one-wacko.html
You can also pull your codes and see if you have those codes
https://www.corvetteforum.com/forums...one-wacko.html
You can also pull your codes and see if you have those codes
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
TECHRON!!! It may even take a few treatments to dissolve the Sulphur on the fuel level sensors. Try clearing the DTCs and see what DTCs reappear and post those DTCs.
Bill.
Bill.
Melting Slicks
Joined: Nov 2014
Posts: 3,399
Likes: 1,339
From: Havre de Grace Maryland
I use Techron every other fill up and so far no major problem. But recently I had the jittery fuel level needle going from empty to fill after fill up. Doing some thought process, I decided to add my Techron when it was full, not just when it was empty realizing there are two tanks and one sensor in each tank. That seems to have cured the problem. My suggestions are to add the Techron when the fueling at near empty and also add one after fill up. and if you can, let the car sit for several days allowing the Techron to work its magic. Good luck resolving your issue. 
