Duramax owners

[Elite13]

Delete efi live and exhaust on my 08 and get a consistent 23

[gtsticker]

I think it was pretty simple to install. I had a 02 Dmax and installed an Airdog II (Airdog 165). It was a great lift pump. Just some QD lines, Mounting the pump to the frame and runngin a few wires. nothing to difficult (to me). I had a 4" MBRP exhaust and loved it.

The LB7 Duramax was produced from 2001-2004.5 The LLY model started in 2004.5 and went on until 2006.5
Do you know if you have a LB7 or an LLY? The LB7 was the last model to come from the factory with out any emission stuff on it. The LB7's also have bad injector problems. My LB7 Duramax that I owned years ago had ejectors go bad... It started with bad fuel mileage and just got worse.. ended up limping the truck home during a trip that I was about 1000 miles away. One of the signs of the injectors going bad is a white-ish smoke with a light blue tint to it at idle. I dont mean to scare you, but injector replacement cost me almost $4500. If you have never replaced them, I might have a qualified and reputable shop look at the engine and do a balance check on them. that will tell you if any are leaking.

If you have any questions feel free to PM me, I had my truck Pretty heavily modded with EFI Live, Suncoast Built Trans, water/ Meth injection and they some. I was getting about 22-24 MPG average on the highway in a 4x4 CCSB and it was a pretty fast truck

Yes I have the LB7 and had to change out my injectors at 150k.
Thanks for all the info. Not planning on selling this truck it is going to be my sons in another year or so

[WItoTX]

We have 8 different trucks here mainly duramax and FSD , if you're getting 15 be happy, don't go trying to buy a myth, chips and deletes are expensive and will never pay for themselves, heck even buying a diesel truck does not pan out till 150,000k miles , unless you are a commercial hauler!! Don't believe what you read on the internet, talking to a a accountant or bookkeeper for a company is your best bet, diesel is nice but great fuel mileage is a myth, both dodge and Volkswagen are getting hammered right now for producing false information on their diesel numbers l every week we have a diesel threads, and every week the same pie in the sky " I get 20 mpg in my dully " guy's post, sorry to be a realist but 15-16 is 3/4 ton good

This.

[gtsticker]

For the guys with the EFI live on older trucks, what brand / model are y'all running

[systemnt]

Flip the mirrors down.. gain 5mpg

[chrisp2012]

08 w exhaust, lift pump and efi live getting 18-22 hwy but city still sucks

[Abcdj]

I know ZERO about cars or trucks. My 05 had a lift pump on it when I bought it 2 years ago.
Question... There are two white canisters bolted to the frame. I am assuming that one or both have filters in them. How often do you change the filters out on the lift pump?
Question... What is EFI?
I told you I know less than zero about auto mechanics!

[hammer63]

'06 2500 dirty max w/ 282K miles....16 mpg @ 75-80 mph...slightly taller tires being the ONLY thing that is not stock.

[Fordnandez]

If you want the best mileage you can get then you will need to run the highest HP tune's. Flip side of this is that it puts more wear and tear on the engine and transmission. Allison is a great transmission in stock form but once you put some aftermarket power to them they don't last long. So the question is with the money you spend on tuner, exhaust and intake and throwing in the change that you might lift a head or tear up the transmission does it make financial sense to get an extra 20-40% fuel economy. I tuned and deleted my 08 Powerstroke when it was brand new and now I have 130K on it with no issues since I baby the truck. If my math is correct I have 92 less fill ups due to my improvement from 11 MPG to 16 MPG over my 130k miles. Figuring at 3 dollars a gallon (remember gas prices from 08 to 14) I have saved 11k in fuel. As mentioned before a new "built" transmission would run me 6k on the low end and head studs/egr/other stuff while I have the cab lifter would be about the same. So the way I look at it I am really even, the only benefit I have gotten from it is not having to stop to fill up as often.

[ACCURACYINC]

Remove your tailgate...

I have a '14 with a 6" lift running 37's with a basic Superchips tuner. I get around 11.5 in town and 14.5 to 15 on the highway.

[DoubleGProstaff]

I have a 2008 duramax with about the same mileage, but what drives me crazy is the tiny fuel tank more than the mileage.


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[S-3 Ranch]

I have a 2008 duramax with about the same mileage, but what drives me crazy is the tiny fuel tank more than the mileage.


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On our short beds we added titan 50 gal tanks and on some trucks bed tanks
Sure helps when 80 miles away from the fuel depot

[gtsticker]

so if you can only do one of the above listed mods which will have the most bang for the buck?