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USD 750
Part #: OZ-ACD-LLY

Oz Tuner OZ-ACD-LLY EFILive AutoCal with Custom DSP5 Tunes

2004.5-2005 GM 6.6L Duramax LLY
Part #: OZ-ACD-LLY
$ $750.00
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The Oz Tuner OZ-ACD-LLY EFILive AutoCal with Custom DSP5 Tunes is the ultimate upgrade when it comes to tuning your 2004.5-2005 GM 6.6L Duramax LLY. You build your truck to perform, don't let lackluster tuning hold you back from getting the performance you want. Each Oz Tuner Calibration is built off of a good basic running calibration that is then tailored specifically for your needs and applications.

DSP5 Operating System
Each DSP5 tune is built with 5 power levels. Power levels are dependent on supporting modifications, but the basics of each level are described below. Naming of tunes is only to help distinguish the different power levels. Each tune can be used differently per an individuals needs or driving style.

  1. No Additional Fueling Added - (Heavy Tow)
  2. Some added Fueling at higher RPM - (Light Tow)
  3. Additional Low & High RPM Fueling - (Street)
  4. More Aggressive High RPM Fueling - (Hot Street)
  5. Max Effort Tuning Per Supporting Modifications - (Race)
How It Works: 
Once you purchase the Oz Tuner AutoCal, Oz Tuner will contact you for specific information about your truck. This information includes VIN number, modifications, tire sizes, and more. Once this information is supplied, the experts at Oz Tuner will build tuning specifically for your truck and you will receive the AutoCal pre-loaded with your custom tuning.

EFILive AutoCal Features & Benefits: 

  • Read and Clear Trouble Codes
  • Black Box Logging
  • Scan & Log OBDII Data
  • Email Updateable Tuning
  • At Home Flashing 
  • Switch Between Tunes
Note: The REQUIRED DSP5 switch is not included. If you do not already have a DSP5 switch, you will need to purchase one to use this tuning (see below). Oz Tuner will not build lope tunes, nor will they build or endorse the use of "Smoke Tunes". Tuning available for 2500HD/3500HD models only. Cab & Chassis tuning not available. 

Due to the fact that this product is tuned for your unique VIN, it cannot be returned.


  • MFG. Number OZ-ACD-LLY
  • Manufacturer Name Oz Tuner
  • Shipping Weight 1.00 lb.
  • Shipping Length 8 in.
  • Shipping Width 6 in.
  • Shipping Height 2 in.
  • Fuel Type Diesel
  • Warranty Yes
  • Warranty Info 1 Year on Hard Parts
  • Prop 65 WARNING: Cancer & Reproductive Harm -


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Emissions Notice

This product is not legal for sale or street use in California. Certain aftermarket products are subject to governmental emission standards regulated by the California Air Resources Board. In order for these products to be legal on a specific vehicle in California, the part number must receive a CARB Executive Order (EO) number. This number makes the part legal for use only on specific years, makes and models of vehicles. A decal with CARB EO number for these parts must be displayed in the engine bay to satisfy smog inspection requirements.