Fuel Gauge PROBLEM
Thread Starter
Instructor
Joined: Dec 1999
Posts: 112
Likes: 1
From: Mesa, AZ
Fuel Gauge PROBLEM
When the fuel gets down to about 1/8 left in the tank the fuel gauge suddenly goes to empty and the warnings are sounded. I still have 70 or more miles left in the tank. Anyone else had this problem?
Melting Slicks
Joined: Feb 2006
Posts: 2,938
Likes: 62
From: Columbia SC
Common problem with C5's. Do a search and you will find many threads about this issue. Get some techron and use it during your next 2 - 3 fill ups and that should solve your problem. 
Last edited by Fast Cop; Mar 8, 2009 at 11:54 AM.
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
EXACTLY CORRECT!
Couple of treatments with Chevron Techron and your issue should be resolved. I use SHELL Fuel exclusively in my 02 Z and have never had this issue. I had it in my 98 but didnt use shell. Chevron Techron cleaned up the issue in the 98.
BC
Couple of treatments with Chevron Techron and your issue should be resolved. I use SHELL Fuel exclusively in my 02 Z and have never had this issue. I had it in my 98 but didnt use shell. Chevron Techron cleaned up the issue in the 98. BC
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
IF,,,,,,,,,,,,,two or three treatments of Techron doesnt fix the issue, you may need to remove the sensors (one from each tank) and either manually clean them OR replace them. If you have to replace them, your lucky. GM use to only sell the entire sensor unit (READ $$$$$$$$).
Now they sell the sender sensor replacement part which is much less expensive.
Now they sell the sender sensor replacement part which is much less expensive.
Le Mans Master
Joined: Mar 2002
Posts: 5,955
Likes: 161
From: PNW
Not sure if the TSB applies to all the C5s or not, you'll have to see if the dealer can give you the specifics.
