Duramax LLY 2004-2005
160hp gain
EFILive.ctzDSP5
$280
Buy on WhatsAppDuramax LLY 2004-2005 Tuning
The 2004.5–2005 LLY Duramax makes strong, dependable power that a tune refines further — more torque down low, better throttle response and improved manners under load.
27 tunesup to 160 hpmodel years 2004-2005from $100
We confirm the exact file fits your truck before you pay — wrong fitment, we make it right.
What owners tune for
- More low-end torque
- Improved throttle response
- Steadier temps under tow
- Smoother power delivery
Popular Duramax LLY 2004-2005 tunes
See all 27Duramax LLY 2004-2005
160hp gain
HP Tuners.hptDSP5
$280
Buy on WhatsAppDuramax LLY 2004-2005
150hp gain
EFILive.ctz
$160
Buy on WhatsAppDuramax LLY 2004-2005
100hp gain
HP Tuners.hptDSP5
$260
Buy on WhatsAppDuramax LLY 2004-2005
100hp gain
EFILive.ctzDSP5
$260
Buy on WhatsAppDuramax LLY 2004-2005
80hp gain
EFILive.ctzTow
$160
Buy on WhatsAppDuramax LLY 2004-2005
80hp gain
HP Tuners.hptTow
$160
Buy on WhatsAppDuramax LLY 2004-2005
75hp gain
EFILive.ctz
$130
Buy on WhatsAppDuramax LLY 2004-2005
50hp gain
EFILive.ctz
$120
Buy on WhatsAppDuramax LLY 2004-2005
40hp gain
EFILive.ctzTow
$150
Buy on WhatsAppDuramax LLY 2004-2005
40hp gain
HP Tuners.hptTow
$150
Buy on WhatsAppDuramax LLY 2004-2005
40hp gain
EFILive.ctzDelete
$180
Buy on WhatsAppDuramax LLY 2004-2005 tuning FAQ
How much does a Duramax LLY 2004-2005 tune cost?
Duramax LLY 2004-2005 tunes start at $100. Price depends on the platform, the features you want and the power level — every tune shows its exact price in the catalog.
What do I need to load a Duramax LLY 2004-2005 tune?
Each file lists the software it's built for — BIN (raw), EFILive, HP Tuners. You'll need that tool or interface; we confirm compatibility with your truck before you buy.
How do I get the file after I order?
Message us on WhatsApp from any tune. Once we confirm your truck, we deliver the verified calibration by hand and support the flash — no accounts or downloads on the site.
Can you build a custom Duramax tune?
Yes. If you don't see your exact setup, message us your truck, goals and tool and we'll build it.