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Products	GM MDI	Vxdiag VCX NANO GM	Tech 2
Picture
Software	GDS 2 Tech2Win	GDS 2 (All)	TIS2000
Need computer	Yes, it ' s pc-based.	Yes, it ' s pc-based.	No, it ' s on-board basic diagnostics.
System Requirement	Win XP only	Win7 64bit/Win8 64bit system	No need to connect PC.
Language	Multi-Language	Multi-Language	Multi-Language (depends on vehicles)
Wifi	Wifi	YES, Vxdiag GM has WiFi version and wireless version	Wireless
Diagnosis	Wireless Basic Diagnostic	Brand-specific Diagnosis	Basic diagnosis
Programming	-wireless Online Programming -offline program, such as European Chevrolet, Opel, and not for all cars	GM tis2web Online Service programming System (SPS)	Online programming on Saab/opel (-2008)
Update	Can not update	Firmware Updatablesoftware Updatable	Update via 32MB Card
Activate	Need activation.	No need to activate	No need to activate
Supported protocols	UART, Class 2, KWP2000 and Gmlan (CAN)	CAN, UART, KW2000, Class2, GM LAN, etc.	CAN interface (NOTE 1)
Supported vehicles	Vehicles from 1990-2014gm,opel, Chevrolet, Saab, Australia Holden (2010-2012)	Vehicles to GM, OPEL	Vehicles from 1992-2013GM, SAAB, OPEL, Uzuki, ISUZU, Holden
Advantage	-can support software from original Factory-support offline programming	-cheap but with the same function as GM Mdi-newest GM scanner for new car	-cannot plug original software card, but can support original Program-easy-Carry On
Read more	GM MDI Interface	Vxdiag GM Scanner	GM Tech 2 Scan Tool

Note 1:
CAN Interface:
Buick Allure (3.6L)
Buick LaCrosse (3.6L)
Buick Rainier (5.3L)
04-05 Buick Rendezvous (3.6L)
04-05 Cadillac CTS (3.6L)
04-05 Cadillac SRX (3.6l/4.6l)
04-05 Cadillac XLR (4.6L)
Cadillac STS (3.6L/4.6L)
Chevrolet Cobalt (2.2L)
Chevrolet Corvette (6.0L)
Chevrolet Equinox (3.4L)
Chevrolet Trailblazer (5.3L)
Chevrolet SSR (6.0L)
Chevrolet Malibu (body/chassis only)
Chevrolet Malibu (3.5L)
GMC Envoy (5.3L)
Pontiac G6 (3.5L)
Pontiac GTO (6.0L)
Pontiac Pursuit (2.2L)

Three GM Scanner for all