Click to enlarge

U7185 DiabloSport 2004.5-2005 GM Chevy Duramax Diesel LLY Engine Predator Performance Programmer Tuner

List Price: $432.00
Sale Price:
You Save: $93.00 (22%) U7185



Current revision for the Predator 2004.5-2005 Duramax LLY 9R07. It is displayed on the main menu of all newer Predators.

The User Manual is available for download.

Predator Revision History

  • June 31st, 2008: 9R01
    • Release for internet updateable versions
  • July 24th, 2008: 9R02
    • Internal update only, no tuning changes
  • January 1st, 2009: 9R05
    • Internal update
  • August 11th, 2010: 9R07
    • Injection Balance Rates Diagnostics added

Predator Applications

The Predator 2004.5-2005 Duramax LLY is applicable for the following vehicles:
  • 2004.5-2005 Chevrolet Duramax 2500
  • 2004.5-2005 Chevrolet Duramax 3500
  • 2004.5-2005 GMC Duramax 2500
  • 2004.5-2005 GMC Duramax 3500
  • 2004.5-2005 GM Duramax Medium Duty Trucks

    Note: Currently this Predator supports 2004.5 -2005 Duramax with the LLY motor. You can easily identify the LLY engine by looking at your VIN number: the 8th digit=2.

    Duramax Medium Duty Truck VIN Requirements:
    • 3rd Digit from left: Must be a letter
    • 8th Digit from left: 2 for LLY Motor
    • 10th Digit from left: 4 for 2004 model year or 5 for 2005 model year
NOTE: Very early calibrations are not supported, update by GM dealer to "Current Software" might be required for some.  GM Software update fixes numerous production bugs and is neccessary to ensure proper performance and tuning. 

To find out about the available PCM updates for your vehicle, please enter your VIN or CalID numbers at this website: GM Service Updates Database. This information will help you with getting the necessary GM dealer warranty update reflash if the Predator requests it.

This is not neccessary to do unless the Diablo Predator refuses to install because of an old GM PCM calibration.

What is the Duramax Predator?

The Predator for 2004.5-2005 Duramax LLY is a state-of-the art high performance tuning flash programmer, which advances the injection timing, optimizes the injection pulse width. Unlike other "tuners", DiabloSportís programming is performed in very small increments throughout the entire RPM range, for a smoother, wider and a more predictable power delivery.

Why to get DiabloSport Predator?
  • The flash tuner that offers five tunes
  • The flash tuner that offers extended speed limiters
  • Performance Tune changes made in less than 45 seconds
  • The flash tuner with most extensive diagnostic capabilities. Predator will read and erase fault codes, monitor live data, re-sets fault codes automatically when factory tune is restored to the vehicle.
  • The flash tuner with a true graphical display that's 300% larger then the competition's puny text only display
  • The flash tuner running on a custom high performance, multi-threading KROS operating system

Dyno Tested Performance Tunes

The Predator was created with one thing in mind, POWER!

A Predator equipped vehicle will notice significant improvements in drivability. The additional power created by the Predator tune will yield quicker acceleration, better mileage and improved towing characteristics, whether it is in town or out on the highway towing an 8,000 lbs trailer.

The power increase in the lower RPMs will yield a better throttle response; help maintain speeds on inclines and towing. The wider power band that the Predator creates will be particularly noticeable in city driving, where speeds constantly change. The mid-to-upper power increase is extremely useful on the highway when passing slower vehicles and to quickly maneuver out of emergency situations.

Predator contains five tunes to choose from:

  • Stock Tune: with adjustable speed limiters. Speed limiter to approximately 120 MPH varies based on vehicle set-up weight, tire size, 2wd vs. 4wd, etc.
  • 40 RWHP and 100-ft/lb TQ - Tow Tune, made specifically for towing. DiabloSport recommended weight limitations based on manufacturer suggested limits for the vehicle.
  • 65 RWHP and 140-ft/lb TQ - Economy Performance Tune, designed for Economy and Performance, fuel economy depends solely on driving style, and will vary from vehicle to vehicle. DiabloSport recommended weight limitations of 8,000 Lbs.
  • 85 RWHP and 170-ft/lb TQ - Performance Tune, designed specifically for performance street driving. DiabloSport recommends this tune not be used for towing.
  • 120 RWHP and 250-ft/lb TQ - XPerformance Tune, designed specifically for opening a can of whoop-ass (pardon the expression). DiabloSport recommends this tune not be used for towing.

DiabloSport strongly recommends the use of larger diameter performance exhaust components and exhaust temperature gauges with the use of any performance diesel tuning.

Adjustable Parameters

The Predator features end user adjustable parameters so the end user can customize his/her tune depending on other modifications done to the vehicle.

The Predator allows the end user to adjust the following parameters:

  • Speed Limiters
  • Re-Calibrate Speedometer for Gear Changes
  • Re-Calibrate Speedometer for Tire Size Changes

Vin Lock

The 2004.5-2005 Predator for the Duramax LLY will unlock itself from vehicle once original backup is restored so it can be used on another vehicle.


The Predators diagnostic features allows end user scan and erase fault codes. Predator can read and erase fault codes, and contains all the GM diesel specific P codes. Predator diagnostics will work on all Chevy and GMC Duramax vehicles.

Please check out our Product Policies.

Concours Direct: Distributors of Quality Car Care and Performance Products.

Can't Find What You're Looking For?
Please contact us so that we can find what you need
Order Line :(805)466-4040

Click here to see ratings