Global Diagnostic System (GDS2)/MDI (Multiple Diagnostic Interface)


The GM MDI is the Global Diagnostic tool for future vehicles starting with Global A vehicles. It’s a compact communication module that manages the transfer of data between a vehicle’s onboard ECU network with an auxiliary CAN bus.

The GM MDI was introduced in the fall of 2007 for Pass-Thru programming and offers faster programming speed using J2534. Depending on vehicle architecture, the MDI can communicate 20% to 70% faster than the Tech 2. It can be used to perform Pass-Thru programming on all vehicles built since 1996 and into the future. Please note that there are other J2534 VCIs (vehicle communication interface) that will perform MDI functions utilizing GDS2 software.

Servicing the next generation Global A vehicles requires the diagnostic software, GDS2 (Global Diagnostic System 2) running on a local PC device while the MDI is connected to the vehicle.

The MDI connects to the vehicle via the J1962 connector using a DLC cable. Connection between the MDI and the PC can be accomplished via standalone (USB) or through (CAT5, or Wireless) networks.

Model Year Coverage

Reprogramming for 1996 – up vehicles

2010 Coverage

  • Chevrolet Camaro
  • Chevrolet Equinox
  • Buick Lacrosse
  • Cadillac SRX
  • GMC Terrian

Additional for 2011

  • Chevrolet Cruz
  • Chevrolet Volt
  • Buick Regal

Additional for 2012

  • Buick Verano
  • Chevrolet Sonic
  • Chevrolet Orlando

Additional for 2013

  • Cadillac ATS
  • Cadillac XTS
  • Chevrolet Malibu
  • Chevrolet Captiva

Tech2Win may be used for earlier backward compatibility for 96 up vehicles.

Tech2Win does not perform all functions of the Tech 2 hand held scan tool.

PC Requirements

  • Intel Core i7 at 2.6GHz 64 bit
  • 2) USB 2.0 (or better) ports
  • 500GB Hard drive
  • 4GB ram
  • Windows 7 Professional 64bit
  • Internet Explorer 9 +
  • Wireless capability

Software License

Available as three different subscriptions.

Complete GM Service Support Package
Includes: GM SI, Tis2Web – All Access, GDS 2, and Tech2Win

MDI Software for GM MDI

GM Vehicle Communication Interface Package
Includes: Global Diagnostic System 2 and Tech2Win

GM Global Diagnostic System 2
Includes: Diagnostic software for GM Global A vehicles (available on a short mid and annual subscription)

The MDI must have an active subscription to to function

Product Feature Set

DTC Code Retrieval
Retrieve OE DTC with code Definition X
Link DTC to service information
Customizable PID display X
Retrieve and display Mode 6 Data
Data Logging
Body X
Chassis X
Electrical X
Powertrain X
Bi-Directional tests
Network Test
J1850 X
Module Programming
Programmable Module Installation procedures X
Module Reprogramming (Reflash) X
Supplemental restraints X
Programmable Parameters ( ability to change in service settings ie, tire size, personality, customer convenience etc.) X
Body Controls
Anti-theft System Functions X
Remote Keyless Entry X
Restraints (supplemental restraints and seat belts) X
Chassis Tools
ABS Service Bleed X
ABS/ Brake system functions X
VSC Initialization/Calibration X
Ride Height Calibration ( for vehicles with pneumatic or hydraulic ride height controls) X
Tire pressure monitor functions X
Cruise Control System tests X
Electronic Ride control X
Electrical Tools
Charging System Tests X
Parking Aid Tests X
Audio X
Testing/Calibration X
Software updating X
Powertrain Tools
Force monitors to run X
Fuel System Test/Relative Injector Flow Test X
Bi-directional control of fuel components X
Bi-directional Ignition System control X
Power Balance Test X
Transmission bi-directional Tests X
Engine Checks and OBD Tests (Drive Cycle, Mode 01, Mode 06 & Mode 09) X
EGR Test X