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Second Generation Duramax Electronics/Tuners Discuss 2004.5-2005 LLY Duramax engine electronic upgrades including chips, tuners, programmers, etc. is the premier Duramax Diesel Forum on the internet. Registered Users do not see the above ads.
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Old 04-27-2019, 11:45 AM   #1 (permalink)
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Considering a chip...

My '05 LLY has had head gaskets replaced, MA transfer case pump done along with normal wear & tear items . . . power steering hose, radiator, etc. Everything else is stock - no lift kit - no engine mods. Not sure how many miles are on it, as my odometer quit reading out a few years back . . . at that time it had about 120K miles . . . now, I'm gonna guess somewhere around 200K. It's my daily driver and occasionally tows a light (4K pound) travel trailer.

The truck runs great! I run a can of Sea Foam through it every few months.

So, I'm wondering if it's worth the money to get a chip? I'm only interested in improving my mileage, mostly when towing.

Any suggestions?

2005 2500HD LLY

Last edited by OkDually; 04-27-2019 at 12:21 PM. Reason: prefix/sig
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Old 04-27-2019, 12:22 PM   #2 (permalink)
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Thread relocated over to "Second Generation Duramax Electronics/Tuners"

1996 K3500 6.5L,( "F" Eng #141 cast block) 5 speed manual, crewcab, dually longbed: 208,000mi.
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Old 05-02-2019, 06:48 AM   #3 (permalink)
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what is your current towing mileage? A EFI Live tune would be the best option verses a can tune as every truck is different.
The mpg gain is minimal and you have to ask yourself if the payback is worth it.
I would give a few vendors here a call and get their input. John Kennedy offers tuning and is a good listener. Just phone call...
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