Gas gage
Thread Starter
Racer
Joined: Sep 2014
Posts: 487
Likes: 113
From: Troy TX
Gas gage
My gas gage started acting up on Sunday. When I filled the tank, the gage only went to 3/4 full. It did seem to function normally and showed a decrease in the tank. I am using Lucas gas treatment on every tank. Is there anything I can do other than take it to the shop.
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I use Techron about twice a year in my gas tank. When the gas level is at or below 1/4 tank, I pour a bottle of Techron that treats 20 gallons into the tank then add the fuel.
Many owners who have experienced the erratic fuel gauge problem have used Techron and it has helped clear up the problem. It won’t always work, but it is worth a try before taking it in for a repair.
Many owners who have experienced the erratic fuel gauge problem have used Techron and it has helped clear up the problem. It won’t always work, but it is worth a try before taking it in for a repair.
Safety Car
Joined: Dec 2010
Posts: 3,938
Likes: 498
From: Fords, NJ
Been using Techron since day one of getting my car in 12/2010 and haven't had a problem.
8VETTE7 was referring to early model production C5's , not late or early production run of the 04.
I don't remember what year GM switched over from accessible to PIA accessible Fuel pumps and Level Sensors
Safety Car
Joined: Dec 2010
Posts: 3,938
Likes: 498
From: Fords, NJ
April 2004 was very near the end of the C5 model production. The FFS system (first pic above) began being installed in the 2003 C5 about late Nov 2002, All C5's built after that time frame have the FFS fuel system. 
The picture above that refers to "early year C5's" means a C5 built BEFORE late Nov. 2002.
Actual first production date for the FFS fuel system according to the C5 Registry was on Nov. 22, 2002.
The picture above that refers to "early year C5's" means a C5 built BEFORE late Nov. 2002.
Actual first production date for the FFS fuel system according to the C5 Registry was on Nov. 22, 2002.
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