2015 Sierra 34CK Fresh water tank level indicators

[Bryan V.]

Hi guys and thanks in advance for any help.

We don't use our fresh water tank much. Only put enough water in to flush the toilet and wash your hands when traveling.
Recently I decided to fill it as a friend suggested. After the overflow had water coming out I when inside to check the level indicator and the lowest light lit but that was all. I've checked it several times since with the same result.

Any quick fixes or do I need to open the belly and check the tank level indicators?

[Towe443]

I just bought a 2017 Sierra 371REBH. I am currently using the water holding tank. Mine has a tank vent in the action area and I have noticed if I just turn the water on to fill the holding tank, it sprays water out as if it builds up an air bubble behind a small amount of water that gets in the vent tube. I discovered that if I blow air into the vent when I turn the fill hose on, It doesn't blow water out. You can also listen and if there is water in the vent it will chug. If you blow air into the vent, it doesn't chug but you can hear the water filling freely. Hope this helps!

[brad2388]

Originally Posted by Bryan V.

Hi guys and thanks in advance for any help.



We don't use our fresh water tank much. Only put enough water in to flush the toilet and wash your hands when traveling.

Recently I decided to fill it as a friend suggested. After the overflow had water coming out I when inside to check the level indicator and the lowest light lit but that was all. I've checked it several times since with the same result.



Any quick fixes or do I need to open the belly and check the tank level indicators?

Look at the sensor setup. These plug on at different levels of the tank. My black tank Forest River didnt hook up the ground side.

This might be the case for you as well. My wireing was green for the ground which is normally for ac not dc.

[Bryan V.]

Thank you sir. I just got my camper back from service so I will check into that.