General Motors

Including: Buick, Cadillac, Chevrolet, GMC truck, Oldsmobile, Pontiac, Saturn

SAE J2534

For access to SAE J-2534 information go to the General Motors service information website ACDelco TDS account login is required to view information.

Technicians must purchase a subscription the Techline Information System (TIS2Web) to gain access to service and programming information. TIS2Web is the web-based subscription service for GM vehicle calibrations, Global Diagnostic System software and Tech2 diagnostic software updates.

Additional information can be found in the GM User Guide (requires IE browser).

VIDEO: Reflashing demo of a 2008 Chevrolet Suburban (14 min)


Which models and model years of vehicles can be reprogrammed?

GM started service programming of Engine Controllers with some vehicles in the 1993 model year and ramped up to nearly 100% by the 1995 model year. The last engine controllers were for diesel engines used in medium duty trucks. All OBDII ECUs are programmable.

Body and chassis controllers were reprogrammable in some vehicles starting in the 1996 MY, and phased in the next few years.


How does a technician determine whether a reprogramming event is needed for a particular vehicle?

To obtain the latest electronic controller calibration information for your vehicle, go to and enter the vehicle's 17 character Vehicle Identification Number (VIN) and select 'Get CAL ID’.

You can then compare the latest part number with the actual number installed on the vehicle to determine if a reprogram is needed.

If assistance is needed, call the TIS2Web helpline at 1-888-212-8959.

What OEM equipment is available to reprogram vehicles? 

The Service Programming System (SPS) application is part of the TIS2Web system. To program an ECU, the SPS application must communicate with the vehicle control modules using the proper J2534 programming interface tool.

The following are the supported interface tools: 

  • Tech 2
  • MDI
  • J2534 Programming Interface Tool

The Tech 2 supports model years 1996 and beyond. With the addition of the CAN Diagnostic Interface (CANdi) module, Tech 2 is fully backward compatible with current Tech 2 functionality and operates transparently when diagnosing non-CAN-equipped vehicles.

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

The GM MDI is the Global Diagnostic tool for future vehicles starting with Global A vehicles. The GM MDI was introduced in the fall of 2007 for Pass-Thru programming and offers faster programming speed. It can be used to perform Pass-Thru programming on all vehicles built since 1996 and into the future. Click here  to view a list of  GDS supported vehicles.

Additional information can be found in the GM User Guide (requires IE browser).

How does a technician obtain the Calibration?

Go to and purchase one of the TIS2Web subscriptions. Once you have access, you can navigate to the Techline Information System website (TIS2Web) and access the programming files under the Service Programming System (SPS) icon.  The TIS2Web User Guide (requires IE browser) guide you through the service programming procedure.

Identify computer system requirements needed to support reprogramming.  

For the latest copy of the TIS2Web Hardware and Internet Specification go to Under the title “Dealer Infrastructure Guidelines”  select “click here” to view the information.
Where can I find information on the use of TIS2Web, Service Information and Tech 2®? (requires Windows 7 to navigate)


Revised 10/29/2015