C5 gas gage
Tech Contributor
Joined: Jan 2007
Posts: 19,471
Likes: 1,171
From: Dyer, IN
Instructor
Joined: May 2010
Posts: 233
Likes: 1
From: San Benito TEXAS
feul guage problem
try techron or seafoam in your gas tank it is doing this because of corrosion buildup around the sending unit float unit if you have warranty like i did they will replace both units at a dealership but you have to show how it is affecting your gauges and it helps if you also know someone at the dealership.
Instructor
Joined: Jun 2010
Posts: 228
Likes: 2
From: California
Bought my 99 C5 about 9 months ago and it did the same thing. So I thought well its just something I'll have to fix later. I always use either Chevron (with Techron) or sometimes 76 Union. Anyway problem went away on its own. Might be something to that Techron. Everything working great for last 5 months!
Instructor
Joined: Jul 2009
Posts: 218
Likes: 1
From: Baldwin Park Ca
o great just got a C5 this week and i was driving it and once it hit half a tank it went down to zero! i will toss in a bottle of seafoam with a full tank. worried because someone told me it could be the transfer pump or something
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