farrah1

I have a '99 zr2 blazer. The fuel gauge reads full all the time. When the vehicle is off is the only time the gauge goes to E. I was wondering if a short in the lead from the tank would cause this or if I should be looking elsewhere.

Tom

OverBoardProject

My guess is it's the sending unit in the tank. They rarely last forever.

I might be wrong here but I believe that the best way to test this is to drop the tank and try another

farrah1

I had thought about the sending unit but was hoping for an easier solution. I hate to drop the tank. Well I am off next week so what better chores to have than work on a vehicle. Thanks for the quick answer.

Tom

OverBoardProject

Sorry farrah I didn't notice that your a new member. Welcome it Automotive Forum.

There is a chance that someone else will know of some easier tests to narrow down your trucks problem. Just in case it is something else. Just watch this thread.

I don't know if you had a chance to read the FAQ section. But the official welcome is in there
http://www.automotiveforums.com/vbul...d.php?t=496966

And I hope that you have a very merry christmas

GMMerlin

The fuel sending unit is located in the fuel tank and is an input to the VCM (computer)
It is a two wire sensor, You can check the operation by measuring the resistance of the sensor.
It should change as the float arm is moved

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farrah1

Thanks for the replies. I am glad I found this site. You have a very Merry Christmas as well.