Chevy and GMC Duramax Diesel Forum banner

2019 3500HD dual fuel tanks

54K views 31 replies 18 participants last post by  MCsoderb 
#1 ·
owners manual says nothing about this system at all. Does it make any difference which tank gets filled first?
From what I have found out, it uses a transfer pump in the rear tank to feed the front tank which feeds the engine. The only quantity sensor is in the front tank and it supposedly uses an algorithm to calculate total quantity.
Anybody have one of these systems on their truck? My previous 4 3500's were all single tank trucks.
Thanks for any guidance
John R Dunn
 
#32 ·
Hey everyone, I just got a 2012 3500 6.6l C&C with knaphied flatbed. Dual tanks and only the rear is in use the dealer or previous owner taped off the filler for the front tank. Been driven at least 300 miles I know of and gauge shows 1/2 . Everything i hear is front tank feeds engine but this seems backwards. Ex service guy told me front level sending unit bad and it will not transfer to rear tank to feed the engine. Any help or info to research would be greatly appreciated.
 
Top