Question 1

GMT(TM) Tuner - [1996-2007]

Accepted Answer

This OBD2 Tuning program is a general purpose calibration editor that allows you to make a wide variety of calibration changes to your vehicle OBD2 type VCM/PCM/TCM from an 'easy to use' Windows environment.
 
After reading and saving the calibration from your vehicle computer, the program locates and displays the calibration parameters in standard engineering units so there's no need to work with or even understand hex and binary numbers. We've tried to make the tables simple to understand as they will correspond to what your scan tool shows you.
 
Features:
Ability to read, modify and reprogram most 1996-2007 GM powertrain control modules (PCM). This includes specific 3.1L, 3.4L, 3.8L, 4.0L, 4.2L Inline, 4.3L, 4.6L, 4.8L, 5.0L, 5.3L, 5.7L, 6.0L, 6.5TD, 6.6L Duramax, 7.4L, and 8.1L. The most complete programming lineup available for popular GM trucks and cars!
Rewrite correct VIN right in the Editor and save the corrected information without having to go back to TIS to Web to correct ECM information.
You can rewrite the calibration section only (faster programming), or do a complete system and calibration reflash.
The software automatically clears trouble codes prior to reading or writing the PCM to ensure proper communication. Trouble codes are then re-cleared after reflashing to ensure normal operation after reprogramming. This is normally a big problem on Corvette with other programming software packages.
NEW PCM Recovery Feature in the event of a failed reflash. Recover dead computers previously 'fried' by GM TIS software or other reprogramming software packages.
VIN check and software calibration level check.
Control of all torque management and abuse modes.
Ability to adjust engine rev and speed limiting for all years (raising speed limiter requires speed rated tires).
Ability to adjust for any tire size or differential ratio change and fix ABS pulse count for scaling errors.
Modify the VE fuel tables for more performance.
Modify injection timing for Duramax and 6.5Turbo Diesel as well as ignition timing in all temperature modes for Inline,V6's and V8 gas models!
Ability to solve transmission shift problems and improve shift quality.
The only available software for 1996 and up 6.5 Turbo Diesel tuning!
Complete DTC list for check engine light disable -- all model year trouble codes (It may be against the law to modify these values).
Passkey disable, BCM and other module communication disable for Offroad installations.
Enables ability to rescale the fuel tank(s) for larger tank installation and proper mileage computer calculations.
Modify tune directly in the graphical environment and watch the numerical value text that shows where you are editing!
Full compare between two calibrations (same OS model only).
Ability to 'copyright' your changes and lock the PCM to prevent over-writing your proven tune. (Locking prevents everyone, even YOU from re-accessing the ECM).
We prefer you tune with a chassis dyno and proper test equipment, as this software is very powerful.
Best of all...NO LICENSE LIMIT! We still offer FREE updates.
The ONLY programming software for the Olds Shelby 1 with 4.0L V8 Northstar!
UPDATE / DOWNLOADS - Email us for Google Drive Update Link!
 
You must have the original version installed first or have installed from your CD prior to updating anything.
 
Now includes the following features:
Added "Calibration module import" function that allows you to import entire module section from one calibration into another. Very helpful with transmission swaps.
Added the "Table Export/import" function that allows you to export table values to a file and then import those values into another table or calibration.
Added a "Reports" menu with new reporting functions including a calibration difference summery report and a difference detail report for comparing calibrations.
The "speed calibration" function for the LT1 cars has been improved and now includes the speed error method and the automatic updating of the transmission tables.
Added checksum verification when you open a calibration file. A warning message is displayed if any incorrect checksums are found.
Added command line support so you can associate *.ddt file with the program and automatically start the OBDII Tuner by double clicking on a *.ddt file.
Added support for using a "," as the decimal separator for European users.
The GMT OBDII Tuner program now supports 32-bit calibration values.
Edit VIN information directly in the Editor instead of at the reflash event.
GMT/DDT kit interfaces are available in Serial or USB style.
We've used our own software package since 1996 to develop our own performance programs. For software updates, please contact us. Current DPS-LS1 Vehicle Support List - Click on the Tabs on the Bottom of the Spreadsheet
 
PURCHASE HERE

Question 2

GMT2(TM) Tuner - [Complete GM]

Accepted Answer

This OBD2 Tuning program is a general purpose calibration editor that allows you to make a wide variety of calibration changes to your vehicle OBD2 type VCM/PCM/TCM from an 'easy to use' Windows environment.
 
After reading and saving the calibration from your vehicle computer, the program locates and displays the calibration parameters in standard engineering units so there's no need to work with or even understand hex and binary numbers. We've tried to make the tables simple to understand as they will correspond to what your scan tool shows you.
 
Features:
Ability to read, modify and reprogram most 1996-2019 GM powertrain control modules (PCM). This includes specific 4-Cylinder, V6 (3.1L, 3.4L, 3.8L, 4.0L, 4.2L Inline, 4.3L), V8 (4.6L, 4.8L, 5.0L, 5.3L, 5.7L, 6.0L, 6.2L, 6.5TD, 6.6L Duramax, 7.4L, and 8.1L). The most complete programming lineup available for popular GM trucks and cars!
Rewrite correct VIN right in the Editor and save the corrected information without having to go back to TIS to Web to correct ECM information.
You can rewrite the calibration section only (faster programming), or do a complete system and calibration reflash.
Ability to completely clone ECU without TIS programming requirement.
The software automatically clears trouble codes prior to reading or writing the PCM to ensure proper communication. Trouble codes are then re-cleared after reflashing to ensure normal operation after reprogramming. This is normally a big problem on Corvette with other programming software packages.
NEW PCM Recovery Feature in the event of a failed reflash. Recover dead computers previously 'fried' by GM TIS software or other reprogramming software packages.
VIN check and software calibration level check.
Control of all torque management and abuse modes.
Ability to adjust engine rev and speed limiting for all years (raising speed limiter requires speed rated tires).
Ability to adjust for any tire size or differential ratio change and fix ABS pulse count for scaling errors.
Modify all fuel and spark tables for more performance.
Modify injection timing for Duramax and 6.5Turbo Diesel.
Ability to solve transmission shift problems and improve shift quality.
The only available software for 1996 and up 6.5 Turbo Diesel tuning!
Complete DTC list for check engine light disable -- all model year trouble codes (It may be against the law to modify these values).
Passkey disable, BCM and other module communication disable for Offroad installations.
Enables ability to rescale the fuel tank(s) for larger tank installation and proper mileage computer calculations.
Full compare between two calibrations (same OS model only).
Ability to 'copyright' your changes and lock the PCM to prevent over-writing your proven tune. (Locking prevents everyone, even YOU from re-accessing the ECM).
Ability to perform segment swaps without having to work in hex.
Patches for anti-theft bypass for stand-alone street rod applications.
We prefer you tune with a chassis dyno and proper test equipment, as this software is very powerful.
Best of all...NO LICENSE LIMIT! We still offer FREE updates.
UPDATE / DOWNLOADS - Email us for Google Drive Update Link!
 
You must have the original version installed first or have installed from your CD prior to updating anything.
 
Now includes the following features:
Added "Calibration module import" function that allows you to import entire module section from one calibration into another. Very helpful with transmission swaps.
Added the "Table Export/import" function that allows you to export table values to a file and then import those values into another table or calibration.
Added a "Reports" menu with new reporting functions including a calibration difference summery report and a difference detail report for comparing calibrations.
The "speed calibration" function for the LT1 cars for 1996-1997 has been improved and now includes the speed error method and the automatic updating of the transmission tables.
Added checksum verification when you open a calibration file. A warning message is displayed if any incorrect checksums are found.
Allows editing even with incorrect checksum. Checksums are properly saved after file is saved.
Added command line support so you can associate *.ddt file with the program and automatically start the OBDII Tuner by double clicking on a *.ddt file.
Added support for using a "," as the decimal separator for European users.
The GMT2 OBDII Tuner program now supports 32-bit calibration values.
Edit VIN information directly in the Editor instead of at the reflash event.
March 2024 Update (found in 2024 Google Drive Folder):
ECUs Covered: Serv. No 12591278, 12591279, 12600930

GMT/DDT kit interfaces are available in USB style.
We've used our own software package since 1996 to develop our own performance programs. For software updates, please contact us.
Current DPS-LS1 Vehicle Support List - Click on the Tabs on the Bottom of the Spreadsheet
 
PURCHASE HERE

Question 3

DDT(TM) Tuner - [Duramax Diesel]

Accepted Answer

For DDT Help PDF Book Check the Instructions Page
 
Features:
As of March 2007, the DDTuner software package is the FIRST and ONLY software editing solution for custom tuning the 1996-2003 6.5 Turbo Diesel from GM. Covers the latest 37 current calibrations from GM. This includes the VIN "S" and VIN "F" trucks, all models including the H1 Hummer/AM General
DDT was the first available (2003) editing and reprogramming system for the 2001-2005 Duramax Diesel, 2006 H1 and HD/MD models.
The DDTuner gives you the ability to read, modify and reprogram any 2001-2005 Duramax powertrain control module (PCM) including 2006 H2 with LLY.
Easy to browse interface without confusing icons and redundant tables.
Rewrites calibration section only (faster programming) or the entire software section for a custom operating system.
Software automatically clears trouble codes before reading or writing PCM to prevent communication errors.
VIN check and software and calibration verification level check must be performed prior to reprogramming the included calibrations for the 6.5 Turbo Diesels.
All torque management and abuse modes editing.
Ability to adjust engine rev and speed limiting for all years (raising speed limiter requires speed rated tires)
Adjust transmission parameters for the 4L80E (6.5 Turbo Diesels). You're finally able to lock the torque converter in any gear you choose.
Ability to adjust for any tire size or differential ratio change (Duramax only)
Modify the fuel tables for more performance and mileage
Modify allowed boost limits and variable vane position on the LLY models.
Defeat EGR systems without any add-on gadgets.
Modify injection timing in all temperature modes to solve cold timing issues.
Modify rail pressure and limits if desired for better injection atomization.
Ability to solve transmission shift problems and improve shift quality.
Total DTC (Diagnostic Trouble Code) function test disable -- great for aftermarket turbos or other applications for boats or custom vehicles.
Complete DTC list for check engine light disable -- all model year trouble codes (It may be against the law to modify these values).
Glow plug timer modification for better cold starts in colder climates--priceless for the 6.5 Turbo Diesel.
Passkey disable and BCM communication disable for Off road installations
Enables ability to rescale the fuel tank(s) and fuel gauge for larger tank installations
New PTO functions as well as cruise control modifications
Copy and paste with a mouse click instead of clumsy drop down menus and PRINT tables within the editor to show your client what you modified for them.
Modify tune directly in the graphing mode--drag graphs or 3D environment.
Full compare between two calibrations (same calibration model only)
Copy and paste tables from a known good file to the other
Ability to lock your tune so the competition can't see your modifications
Preference to tuning shops with chassis dyno's and proper test/scanning equipment.
Best of all...NO LICENSE LIMIT! Tune unlimited vehicles. Free updates on request as new parameters are available. (These are no longer automatically emailed out--you must request them).
Roadrunner USB Drivers here...usb_drivers.zip these are needed for the DDTrealtime unit for realtime Duramax 2001-2004 LB7 tuning.
All 6.5 Turbo Diesel support is a free upgrade for our DDT and GMT customers.
Software operating information on the Instructions Page.
UPDATE / DOWNLOADS - Email us for Google Drive Update Link!

You must have the Standard Version installed first, or have installed from your CD.
 
Now includes the following features:
Added "Calibration module import" function that allows you to import entire module section from one calibration into another. Very helpful with transmission swaps.
Added the "Table Export/import" function that allows you to export table values to a file and then import those values into another table or calibration.
Added a Reports menu with new reporting functions including a calibration difference summary report and a difference detail report for comparing calibrations.
The speed calibration function for the LT1 cars has been improved and now includes the speed error method and the automatic updating of the transmission tables.
Added checksum verification when you open a calibration file. A warning message is displayed if any incorrect checksums are found.
Added command line support so you can associate *.ddt file with the program and automatically start the OBDII Tuner by double clicking on a *.ddt file.
Added support for using a ',' as the decimal separator for European users.
The GMT OBDII Tuner program now supports 32-bit calibration values.
Custom tuning help is always available by emailing our programmer with your file or tuning problem. We have a real phone number with real tech support.
 
DDT-RT kit comes with a realtime communication unit fitted to the PCM(s) of your choice, and communications interface. You must be a DDTuner user to upgrade to DDT-RT.
 
We've used our own software package since 2002 to develop our own performance programs. With a properly built transmission and driveline, it's relatively simple to make your Duramax truck FASTER than a Corvette ! We've had dyno results of over 720HP and 1340ft/lbs on an independent dyno test with our race computer upgrade.
 
Check the GMT Version of the tuning software package...soon to be the ONLY software package with complete GM coverage with free updates. (FREE means you get free template upgrades--not just a free download).
 
PURCHASE HERE

Question 4

DDT-RT(TM) Tuner - [REALTIME]

Accepted Answer

Features:
Ability to reprogram in REAL TIME any supported 1998-2007 GM powertrain control module (PDM).
Rewrites calibration sections as you make changes.
You can monitor your changes as you make them with a scan tool directly connected to the vehicle.
Supports both LS1 style and LB7 to 2007 including medium and heavy duty models.
All tuneable features as in the DDTuner software packages.
Preference to tuning shops with chassis dynos and proper test equipment.
Best of all... NO LICENSE LIMIT!! Free updates as new parameters are available.
Available now... seeing pricing page. Existing Wester's Dealers, there is a reduced rate available.
Roadrunner USB Drivers here (usb_drivers.zip). These are needed for the realtime unit.
Coming soon... all 6.5 Turbo Diesel support. Free upgrade for our DDT customers.
UPDATE / DOWNLOADS - Email us for Google Drive Update Link!
 
DDT-RT kit comes with a realtime communication unit fitted to the PCM(s) of your choice. You must be a DDTuner user to upgrade to DDT-RT.
We've used our own software package for the last several years to develop our own performance programs. With a properly built transmission and driveline, it's relatively simple to make your Duramax truck faster than a Corvette! We've had dyno results of over 540 HP and 1080 ft/lbs on an independent dyno test with our computer upgrade alone and stock turbocharger.

Question 5

DPS(TM) System - [Read/Write]

Accepted Answer

The Dealer Programming System or DPS(TM) consist of cables, communication interface, and software with free updates, giving you the ability to download the software of your Ford or GM vehicle powertrain control module, save the file in your computer, and email us the file for modification.
The calibration is then returned via email for upload to your client's vehicle computer. You always retain the original file if your client needs their 'stock' programming again. Retail pricing varies depending on options chosen--but your calibration cost is consistent regardless of changes requested.
The system can also include a laptop computer if so desired with everything pre-installed.
UPDATE / DOWNLOADS - Email us for Google Drive Update Link!
PURCHASE DPS-LS1 HERE
PURCHASE DPS-LS2 HERE
PURCHASE DPS-Ford HERE

Question 6

OBD1(TM) Tuner Program - [Pre-1995]

Accepted Answer

Click on the OBD1 Heading Above

11/2025: See "Shipping" Page for Tariff Info

Closed Canadian Stat Holidays

Product Info