Fred, When you say two senders are known to be good, did you meter them ?

Take a look at this web page.

I found it by typing "fuel gauge repair" in a Google search line..

I hope you are putting a siren and emergency lights on this GMC. I have never seen posts about any other vehicle that create such a sense of urgency..

Bill M
53 GMC Hydra-Matic

Home Page
http://home.comcast.net/~bd97/index.html

When you argue with a fool, two fools are arguing..