till 2009 yaer GM car.so you dont need order GM TECH2.
General Motors Global Electrical Architecture (Global A) and Global Diagnostic
Hardware &Software
Global Diagnostic System DGS& Mutiple diagnostic Interface MDI
MDI and GDS Background
MDI is an interface between the vehicle DLC and a PC (by wired USB, wired
Ethernet, wireless Ethernet ) and TIS2web.
Can be Used for SPS programming on existing and future SGM vehicles
Required for diagnostics on new SGM Global A Electrical Architecture Vehicles
Used with TIS2Web, GM Global Diagnostics System (GDS), SPS and MDI Manager
Software
Allows for GDS diagnostic
GM Multiple Diagnostic Interface (GM MDI)
All current and most legacy vehicle protocols: UART, KW2000, CLASS2, GM LAN,
etc.
Needed for Global A architechture vehicles
Supports Service Programming System (SPS)
Passthrough progrmming on past model and Global A vehicles
Supports PC-Based diagnostics with rollout of the Global Diagnositc System
(GDS) application
Includes Flight Recorder Mode
New Diagnostic Application Software required for Global A Vehicles
Global Diagnostic System (GDS)
PC-based software diagnsotics
DTCs, Diagnostics, Data Display & Visualization, Device Controls, Special
Tests, Flight Recorder management, etc.
GDS is software which runs on a specific PC. Updates received via TIS2Web.
Multiple display options. More space for diagnsotics. Session management for
multiple us.
when you test after 2010 year gm car ,you can use gm gds2 software:
