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OZ Tuner EFILive AutoCal with Custom Switchable ECM Tuning w/o Switch - 03-04 Chevy/GMC Duramax Late LB7

Thoroughbred Sku #: OZTOZ-ACD-LB7-0304
Manufacturer Sku #: OZ-ACD-LB7-0304


NOTE: If you have a C&C you will need to send your stock file in to be modified.


  • 2003 - 2004 Chevy C4500 Kodiak
  • 2003 - 2004 Chevy C5500 Kodiak
  • 2003 - 2004 Chevy Silverado 2500
  • 2003 - 2004 Chevy Silverado 3500
  • 2003 - 2004 GMC C4500 TopKick
  • 2003 - 2004 GMC C5500 TopKick
  • 2003 - 2004 GMC Sierra 2500
  • 2003 - 2004 GMC Sierra 3500

Product Details

Product Name: DSP5 Autocal (No DSP5 Switch)
Manufacturer: OZ Tuner
Application: 2003-2004 Chevy/GMC Duramax Late LB7

The Duramax AutoCals all come loaded with one DSP5 tune. Each Oz Tuner calibration is built off of a basic good running calibration, and is then tailored specifically for your needs and applications.

  • *Tuners are non returnable due to being vehicle specific

**DSP5 Operating System**Each DSP5 tune is built with 5 power levels. Oz Tuner will not build lope tunes, nor will we build or endorse the use of "Smoke Tunes".

Power levels are dependent on supporting modifications, but the basics of each level are described below.

  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)

*Naming of tunes is only to help distinguish the different power levels. Each tune can be used differently per an individual’s needs or driving style.

Data Collection Requirements:

  • Year
  • Transmission (Auto/Manual)
  • Transmission (Stock/Built or Upgraded Clutch)
  • Tire Size
  • 17 Digit VIN
  • Cab and Bed Configuration
  • Truck Modifications (Injectors Size, Dual/Single CP3 and size, Turbo, Gear Ratio, etc.)
  • Truck Goals & Intended Uses
  • Phone Number
  • Email Address
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