2010 Duramax Auxiliary fuel tank plumbing.

Same concept, different truck. Not particular to the brand of truck. Unless I didn’t understand the question.

Aren’t electric pumps required between fuel tanks? For positive shutoff in a crash?

I know it’s the same “concept”. Like I said I have done a number of Ford and Ram trucks. In some years though they will never overfill the stock tank and leak. Like in an 06 Ram.
My question is weather a GM product will leak without the use of a gravity flow control valve?

Lwiddis wrote:
Aren’t electric pumps required between fuel tanks? For positive shutoff in a crash?

No

ivbinconned wrote:
I know it’s the same “concept”. Like I said I have done a number of Ford and Ram trucks. In some years though they will never overfill the stock tank and leak. Like in an 06 Ram.
My question is weather a GM product will leak without the use of a gravity flow control valve?

They all need a check valve for “automatic” filling afaik.

My 55 gal inbed tank switches over with a toggle switch on my sash and fuel gauge still works for either tank and also fuel used. Had it made when our 05 truck was new do march 06 before we headed home it was made and installed. We really have enjoyed what it does for us. chevman

larry barnhart wrote:
My 55 gal inbed tank switches over with a toggle switch on my sash and fuel gauge still works for either tank and also fuel used. Had it made when our 05 truck was new do march 06 before we headed home it was made and installed. We really have enjoyed what it does for us. chevman

Very convenient as well. Curious how the gauge works running off the slip tank?