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Old 01-10-2021, 04:50 PM   #1
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04 Avalance fuel sending unit issue

Randomly the fuel gauge will drop to empty and then eventually recover to actual tank volume. Has anyone had a similar issue? Also, does this sending unit also tell the generator not to start due to low fuel?
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Old 01-10-2021, 07:42 PM   #2
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Quote:
Originally Posted by kspickard View Post
Randomly the fuel gauge will drop to empty and then eventually recover to actual tank volume. Has anyone had a similar issue? Also, does this sending unit also tell the generator not to start due to low fuel?
I don’t know if the Avalanche has different sender and gauge set up than the Limited, but what you describe sounds like a sender issue. There are times when my gauge will do a similar thing, but it is always when about 1/2 tank is left, never from a full reading. I chalk it up to the baffles and volume in the tank as well as the mechanics of the sender. Sometimes, the opposite will happen—the gauge will rise to a higher level than I know is possible, but will return to relative accuracy a while later. Again, always when tank is far below full or even 3/4 full.

I don’t think the gauge or sender are related to the generator starting. That is from the depth of the generator pick up tube inside the tank. Avalanche may be different.
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Old 01-14-2021, 12:17 AM   #3
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Normally the signal to the genny is no fuel.

On the intermittent fuel gauge, check the connection at the sender and the ground.
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