L5P: Auxiliary Fuel Tank - Diesel Place : Chevrolet and GMC Diesel Truck Forums
 
Home Forum Market Place Garage Tuning Library DTC Tool Register Vendors
Go Back   Diesel Place : Chevrolet and GMC Diesel Truck Forums > Power, Performance & Tuning > Fuel System, Air, Exhaust, & Emissions Upgrades
Register FAQ Forum Rules My Replies My Threads Mark Forums Read Advertise

Fuel System, Air, Exhaust, & Emissions Upgrades Discuss upgrades to the Duramax fuel system and air system. Bigger turbochargers, more turbo chargers, air boxes, exhaust systems, emissions systems, and fuel pumps all go here.

DieselPlace.com is the premier Duramax Diesel Forum on the internet. Registered Users do not see the above ads.
Like Tree1Likes

Reply
 
LinkBack Thread Tools
Old 04-23-2019, 12:36 PM   #1 (permalink)
hbcbob3
Diesel Head
 
hbcbob3's Avatar
 
Join Date: Mar 2008
Location: Edgar Springs, MO
Posts: 583
iTrader Score: 0 reviews

Auxiliary Fuel Tank

I tried searching for this, but to no avail.


I have a 60 gallon RDS fuel tank/tool box combo that I'd like to install in the bed and plumb into my fuel tank. I had heard that this could cause codes on the dual-tanked trucks due to the computer seeing fuel flowing into one tank but not leaving another.



I have a single tank setup on a 2019 3500, and according to the local dealer, this shouldn't cause a problem, but he was not 100% as they hadn't seen it yet.



Anyone out there have a tank rigged up to a new L5P, and how'd you plumb it in? Thanks!

__________________
2019 L5P Duramax - 3500HD All-Terrain SRW

"The world is run by those who show up"

"It was the most I ever threw up, and it changed my life forever."

"If Moo-Shu fits, wear it."
Offline  
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 04-23-2019, 12:49 PM   #2 (permalink)
OkDually
Administrator
 
OkDually's Avatar
 
Join Date: Jul 2013
Location: N.E. Oklahoma
Posts: 14,078
iTrader Score: 0 reviews

DieselPlace.com Lifetime Premium Member

Thread relocated over to "Fuel System, Air, Exhaust, & Emissions Upgrades"
for better responses



__________________
1996 K3500 6.5L,( "F" Eng #141 cast block) 5 speed manual, crewcab, dually longbed: 208,000mi.
Diamond Eye 4" Turbo Back Exhaust w/2.5" Flo-Pro Crossover
AirDog II DF165 w/ tank sock delete - XDP
TD-Max boost controller - Kennedy Diesel
OPS extension hose - Leroy Diesel
Glow Plug Harness- PT Wiring Solutions
Glowshift Maxtow EGT,Boost, Fuel gauges
Boost & Fuel Pressure Bolts - Leroy Diesel
2/0 Battery Cable Upgrade - PT Wiring Solutions
PMD w/#9 resistor and Re-Location Kit, mounted to bumper - Leroy Diesel
GM-5 Turbocharger
4.10 gear ratio
OptiLube Winter Formula


Proud member #1039 of The 3500 Dually Club

Online   Reply With Quote Quick reply to this message
Old 04-23-2019, 02:59 PM   #3 (permalink)
cwq21
Diesel Boss
 
Join Date: May 2004
Location: Port Allen, La.
Posts: 1,388
iTrader Score: 0 reviews

I have a 45 gallon aux. tank and solenoid valve on mine and flip the switch inside when I need it and turn it off when I'm full. On my 2003 I just had a manual valve and left it open all the time and after driving ~150 miles my fuel gauge would show empty but once the aux. tank ran empty and my main tank level started dropping the fuel gauge would start showing a level again.
Attached Images
File Type: jpg Valve.jpg (47.3 KB, 4 views)
File Type: jpg Tank.jpg (63.3 KB, 4 views)
__________________
2018, 3500, SRW, LTZ, Z-71 4X4

Passed down to my son - '03 Silverodo LT, CC, D/A, 4X4, Hypertech, Rino, Bilstiens, TTT's. Eric's pump upgrade, 4" MBRP exhaust, AFE Intake.
2015 Camaro SS2
'06 Mobile Scout 31 BWFS 5th wheel

Owner @ Port Allen Tire & Service
Offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 04-23-2019, 06:53 PM   #4 (permalink)
dag4566
Diesel Nut
 
Join Date: Jan 2004
Location: South Texas, Texas
Posts: 781
iTrader Score: 1 reviews
Send a message via AIM to dag4566

Lone Star Diesels Member

Same basic setup, no issues on an 2019.
__________________
12 Chevrolet 3500 CCLB SRW 4x4 LML

95 Suburban k1500 6.5L

07 Classic GMC 2500 CCSB 4x4 LBZ (Sold)

02 GMC 2500 CCSB 4x4 LB7 (Sold)

Last edited by dag4566; 04-23-2019 at 06:54 PM.
Offline   Reply With Quote Quick reply to this message
Old 04-23-2019, 09:55 PM   #5 (permalink)
18LP5
Heat Sink
 
Join Date: Jun 2018
Posts: 12
iTrader Score: 0 reviews

I've got an RDS 40 gal. tank w/toolbox combo in my 2018 3500 DRW. Originally it was plumbed as a gravity feed into the OEM fuel inlet hose to the OEM tank. I'm still using the same plumbing, but put in an inline fuel pump instead of using a solenoid valve for gravity feed.

I've had this setup for several months with no problems or codes/messages.
__________________
2018 3500 DA/DRW 4x4 LTZ
Offline   Reply With Quote Quick reply to this message
Old 04-24-2019, 01:47 AM   #6 (permalink)
jake111
Diesel Boss
 
Join Date: Jan 2005
Location: So. Calif.
Posts: 1,359
iTrader Score: 0 reviews

I don't have an aux tank, but I'm been on this forum for over 14 years . . .

Discussions on this topic, even years ago, suggested that GM put "sanity" checks in the some of computer programming. So, if you're driving along and the fuel tank is getting fuller . . . insanity!! . . . so it knows something is wrong. To be safe, it would set the fuel gauge to E since it lost confidence in the sensor reporting.

The easy solution is to only transfer fuel when parked (rest area, lunch, etc., when traveling). Or if done while moving, accept that it might complain and set codes and point to E; then just reset (if codes) at some convenient time later, and I would expect the fuel gauge would come back to life, too.
__________________
2004.5 Silverado 3500 SRW 4x4, D/A (LLY), Ext. Cab, Long Bed
TxC V2 aux radiator w/Fan (leaked after 12 yrs), engineer837 aux rad , TxC CAI, LBZ MP, Scangauge II, Nicktane aux filter head, KD lift pump, 2008 PS pump, 2011 hydroboost, Frederico Swaybars, Rancho 9000XL, Torklift StableLoads, BFG AT/KO2, Lance 835 Camper often in the bed.
Offline   Reply With Quote Quick reply to this message
Old 04-24-2019, 12:50 PM   #7 (permalink)
hbcbob3
Diesel Head
 
hbcbob3's Avatar
 
Join Date: Mar 2008
Location: Edgar Springs, MO
Posts: 583
iTrader Score: 0 reviews

Appreciate the replies!



I had one on my old '07 Dmax, with a pump, without any issues at all. I even plumbed it in through the vent tube instead of the actual filler neck. I just wanted to make sure everything was still legit.


jake111: I never got any "insanity" codes or anything running down the road while filling. That's what I was hoping not to happen with the new trucks either. Looks like the other guys are doing fine with it. I'll keep my fingers crossed. Looks like cwq21 was having this "sanity" issue on his '03.
__________________
2019 L5P Duramax - 3500HD All-Terrain SRW

"The world is run by those who show up"

"It was the most I ever threw up, and it changed my life forever."

"If Moo-Shu fits, wear it."
Offline   Reply With Quote Quick reply to this message
Old 05-04-2019, 11:38 PM   #8 (permalink)
D_R_C
Diesel Prodigy
 
D_R_C's Avatar
 
Join Date: May 2007
Location: Rocky Top, USA
Posts: 4,053
iTrader Score: 0 reviews

Quote:
Originally Posted by hbcbob3 View Post
Appreciate the replies!



I had one on my old '07 Dmax, with a pump, without any issues at all. I even plumbed it in through the vent tube instead of the actual filler neck. I just wanted to make sure everything was still legit.
This IMO this is the better way to plumb thru the vent tube with a T.
Slower transfer, less chance of issues with the fuel gauge.
Just remember to pay attention to the fuel gauge as your transferring, when it hits about 3/4 tank stop the transferring.
It’ll continue to go up a little from there.

I have a RDS 60 gallon aux tank with tool box, electric pump with normally closed solenoid on a switch when running warning light in the cab, powered only when ignition is on.
I recently added a 3mm amber LED flashing light next to my CTS2 on the dash, much easier to see when fuel is transferring, so hopefully I won’t forget.
Attached Images
File Type: jpg 8F391F35-CF53-490D-97CF-27A3E8F79A50.jpg (68.7 KB, 3 views)
__________________
2007.5 GMC "Black" Sierra SLT 3500HD SRW C.C. 4X4 LMM Z71
DIY stock airbox mod, aFe ProGuard 7, OEM drop-in
EFILive ECM ATP - Heavy Tow Tune with Turbo Brake
EFILive TCM Duramax Tuner
DHD Cold Side High Flow Intake Pipe
DHD PCV Re-route
AirDog 4G100


2007 GMC Yukon Denali "BLACK" 6.2 gasser, DIY stock airbox mod, K & N OEM drop-in, Airaid intake tube, EFILive TCM tuned

Last edited by D_R_C; 05-04-2019 at 11:39 PM.
Offline   Reply With Quote Quick reply to this message
Old 05-06-2019, 11:03 PM   #9 (permalink)
D_R_C
Diesel Prodigy
 
D_R_C's Avatar
 
Join Date: May 2007
Location: Rocky Top, USA
Posts: 4,053
iTrader Score: 0 reviews

FYI, the idea of having a electric pump and a normally closed solenoid wired inline ign powered is double protection if one was to fail allowing fuel to flow.
This is how most of the shops thatís license to install auxtanks.
__________________
2007.5 GMC "Black" Sierra SLT 3500HD SRW C.C. 4X4 LMM Z71
DIY stock airbox mod, aFe ProGuard 7, OEM drop-in
EFILive ECM ATP - Heavy Tow Tune with Turbo Brake
EFILive TCM Duramax Tuner
DHD Cold Side High Flow Intake Pipe
DHD PCV Re-route
AirDog 4G100


2007 GMC Yukon Denali "BLACK" 6.2 gasser, DIY stock airbox mod, K & N OEM drop-in, Airaid intake tube, EFILive TCM tuned
Offline   Reply With Quote Quick reply to this message
Old 05-06-2019, 11:31 PM   #10 (permalink)
heymccall
Diesel Elite
 
heymccall's Avatar
 
Join Date: Feb 2005
Location: Butler county, PA USA
Posts: 17,745
iTrader Score: 0 reviews

It isn't the gauge going up that's an issue, it's the gauge not going down as expected. This is most common on larger replacement tank installed in the stock tank location.

__________________
Brian
'13 Hyundai Genesis Coupe handshaker
'14 Peterbilt 337 handshaker
Quote:
Originally Posted by GetSome8.1HD
Its not like I said I enjoyed reading Good Housekeeping while taking a candle lit bubble bath then proceeding to using a loofah with exfoliating creams all while thinking about you . Now THAT would be creepy
Member #21 of the OiO association
Offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Diesel Place : Chevrolet and GMC Diesel Truck Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

PLEASE READ! You must check your email inbox for the confirmation link to complete registration. Please check your spam box if you do not see the email in your inbox.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Insurance
Please select your insurance company (Optional)

Log-in


Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
GM Service Manual Diagnostics for P0088? AHGSP Duramax Fourth Generation: 2007.5-2010 (LMM) 20 03-07-2018 05:15 PM
LLY: LLY losing prime overnight, NOT filter housing Bkreider252 Duramax Second Generation: 2004.5-2005 (LLY) 8 02-03-2018 06:03 PM
05 LLY Crank No Start after CP3 Replacement ABchevy Duramax Second Generation: 2004.5-2005 (LLY) 11 06-05-2017 06:19 PM
Auxiliary fuel tank Enable in PCM artementy Vans 0 05-24-2016 08:00 PM
Info: The 6.5L FAQ's... The Master List of Information and 6.5 Answers knkreb 6.5L Diesel Engine 16 07-15-2015 01:42 PM


All times are GMT -4. The time now is 11:10 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Shoutbox provided by vBShout v6.2.1 (Lite) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd. Runs best on HiVelocity Hosting.
© AutoGuide