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Frankenstein Did you put a 6.5 in a Camaro? A Duramax in a boat? A Cummins in a Chevy? A Powerstroke in a van? Then you must have a touch of the good Dr. Frankenstein. Post your stories, questions, discussions in here... this is intended to be a place to discuss your questions on how to, what to do, etc...

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Old 11-08-2019, 02:05 AM   #941 (permalink)
Markmx6
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Thank you

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2003 Suburban 2500 4x4
Hopefully soon will be converted to Duramax
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Old 11-08-2019, 07:36 AM   #942 (permalink)
drcracer
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You’re welcome. Yeah, it will be the best thing you’ll ever do for your truck. My 8.1 got like 13 mpg and the duramax gets around 20. It was a lot of fun to work on too.
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Thank you


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2003 Chevy Avalanche 2500 4x4
powered by 2006 LBZ
Kennedy lift pump
4"Diamond Eye Exhaust
S&B cold air intake
DSP 5 by Idaho Rob
6 SPD Allison w/ TrasnGo Jr & triple disc converter
2 in reverse rake body lift
4 in suspension lift
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Old 11-11-2019, 04:14 PM   #943 (permalink)
vdb11
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Hi everyone,

I am working on a few things on my 2004 suburban and need some help.

1. Is there a way I can put a manual switch on the transfer pump from the secondary tank to the primary? I pulled the pigtail off the pump on the rear tank and I have a light green, dark blue, and two black wires. Eventually I will get the tune for it to work correctly.

2. I have tried to wire the wait to start light based on wiring diagrams I have found online. I ran a wire from the C1 connector on the ECM (dark blue wire) to the A2 pin on the cluster pigtail with no luck. I didn't wire all the way to the C1 connector, I started at the plug under the fuse box. I am still getting a P0381 code and no light on the cluster.

Any help would be greatly appreciated. I learned a great deal from reading through this thread, and I am looking forward to joining the brotherhood shortly!


EDIT: Sorry forgot to mention, engine is a 2005 LLY.
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1992 6.5L/NV4500
2005 LLY/ZF6

Wife's:
2005 LLY/ZF6
2015 Passat TDI 6-speed

Last edited by vdb11; 11-11-2019 at 04:14 PM.
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Old 11-11-2019, 04:33 PM   #944 (permalink)
drcracer
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Hi there, I had the same problem with my Avalanche until I got the tune just right for my dual tanks. One way you can do it is remove the secondary fuel pump relay and run an external relay system. The mount your switch in the dash tap a fused ignition on hot wire from your internal fuse box, like your radio, and then run it to the external relay for the activation side. Then on the switch side, just run this to your switch side of the relay in the fuse box. Basically you’re removing the relay that’s switched by the computer and now making it switched by you.

As for the wait to start light, I just ran mine from the dash all the way to the ECU connector, works just fine.
Quote:
Originally Posted by vdb11 View Post
Hi everyone,

I am working on a few things on my 2004 suburban and need some help.

1. Is there a way I can put a manual switch on the transfer pump from the secondary tank to the primary? I pulled the pigtail off the pump on the rear tank and I have a light green, dark blue, and two black wires. Eventually I will get the tune for it to work correctly.

2. I have tried to wire the wait to start light based on wiring diagrams I have found online. I ran a wire from the C1 connector on the ECM (dark blue wire) to the A2 pin on the cluster pigtail with no luck. I didn't wire all the way to the C1 connector, I started at the plug under the fuse box. I am still getting a P0381 code and no light on the cluster.

Any help would be greatly appreciated. I learned a great deal from reading through this thread, and I am looking forward to joining the brotherhood shortly!


EDIT: Sorry forgot to mention, engine is a 2005 LLY.
__________________
2003 Chevy Avalanche 2500 4x4
powered by 2006 LBZ
Kennedy lift pump
4"Diamond Eye Exhaust
S&B cold air intake
DSP 5 by Idaho Rob
6 SPD Allison w/ TrasnGo Jr & triple disc converter
2 in reverse rake body lift
4 in suspension lift
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Old 11-11-2019, 04:51 PM   #945 (permalink)
Kriesel
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Quote:
Originally Posted by vdb11 View Post
2. I have tried to wire the wait to start light based on wiring diagrams I have found online. I ran a wire from the C1 connector on the ECM (dark blue wire) to the A2 pin on the cluster pigtail with no luck. I didn't wire all the way to the C1 connector, I started at the plug under the fuse box. I am still getting a P0381 code and no light on the cluster.
Make sure that both sides of the C100 plug have the blue wire lined up. The engine side of the C100 should have the blue wire already, since it was on the duramax already. I ran a wire from the C100 plug to the back of the cluster.

The blue wire on the C100 plug, this is a view of the suburban side of the C100 plug, like I said the engine side of the plug is wired already, and goes from the ECM to the C100, so you just need to go from the C100 to the back of the cluster:


Blue wire in A2 on the back of the cluster:
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'97 Cherokee - Cummins Swap
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Old 11-11-2019, 05:30 PM   #946 (permalink)
vdb11
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Thanks guys!

I will check the wiring for my wts light. I believe that is exactly what I did, but I will double check. If I pin into the back of the C100 plug (ECM side), should I get voltage with a test light when the glow plugs come on? I just want to make sure the ECM is actually sending the wts signal.

What sort of relay have you all used for the external relay system?

Thanks again!
__________________
1992 6.5L/NV4500
2005 LLY/ZF6

Wife's:
2005 LLY/ZF6
2015 Passat TDI 6-speed
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Old 11-11-2019, 05:50 PM   #947 (permalink)
drcracer
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I just used the one that I pulled out of the fuse box, but again it was only temporary until I got the tune. It won’t hurt to use it long time. Just doesn’t look factory.

Quote:
Originally Posted by vdb11 View Post
Thanks guys!

I will check the wiring for my wts light. I believe that is exactly what I did, but I will double check. If I pin into the back of the C100 plug (ECM side), should I get voltage with a test light when the glow plugs come on? I just want to make sure the ECM is actually sending the wts signal.

What sort of relay have you all used for the external relay system?

Thanks again!
__________________
2003 Chevy Avalanche 2500 4x4
powered by 2006 LBZ
Kennedy lift pump
4"Diamond Eye Exhaust
S&B cold air intake
DSP 5 by Idaho Rob
6 SPD Allison w/ TrasnGo Jr & triple disc converter
2 in reverse rake body lift
4 in suspension lift
Offline   Reply With Quote Quick reply to this message
Old 11-11-2019, 06:02 PM   #948 (permalink)
Kriesel
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Quote:
Originally Posted by vdb11 View Post
should I get voltage with a test light when the glow plugs come on?!
I would think so, yes.

Could be the LED on the cluster is bad... I had a cluster that the LED for the cruise control was bad, so it's not unheard of.
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'06 VW TDI - Malone tuned, stage 2 SMF clutch, stock otherwise
'97 Cherokee - Cummins Swap
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Old 12-11-2019, 07:24 PM   #949 (permalink)
Sierra_Grande
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Colorado Durabrb swapper?

I'll admit to having skipped to the end of this to post a question. I was wondering does anyone here know a shop or mechanic on the front range of Colorado who would want to do a Duramax into a 2011 Suburban? I just bought one, as is no warranty of course, and the 6l80e is shot. I know this is way $pendier than replacing the 6l80e, but I want a diesel suburban. I love the look of the '07-'14 burbs.

Background, I currently have a '73 Suburban with a 6.5 swapped in and used to have a '96 Suburban with a 6.5. These trucks are way more fun to drive with tons of torque

Thanks anyone who may know.
-Ian
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2011 Suburban K1500 LTZ (DD)
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Old 12-11-2019, 10:24 PM   #950 (permalink)
SButler83
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Hi Guys, I want to thank you all for the time and effort you've put in to help all of us doing our own conversions.
I'm about to relocate soon, so starting my project is going to be delayed, but I have a 2001 Suburban 2500 8.1L 4x4 w/ 277K miles, and the donor is a 2002 LB7 Allison 4x4 with 226K miles. I was fortunate to get a running, driving, complete donor truck which does need injectors prior to the swap.
Currently in Texarkana but will be moving to the Gonzales, TX area in the near future.

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