Technical Support Programs

Technical Service Infomation With over 100 years of experience in the automotive industry, ACDelco - a division of General Motors, is the most qualified and committed champion of automotive service technicians.

Fully aware of evolving vehicle complexities, ACDelco understands the repair business and is dedicated to providing the most current repair information, campaigns, service bulletins, programming software and trained technical support.
For more information on GMSi and TIS2Web, see the Support section on the right. To link to the Technical Support Programs described below, use the Quick Links section on the left.

ACDelco’s encyclopedia for GM technical service information. GMSI provides web based publications for North American built vehicles, updated by GM on a daily basis.
The online store is available to users of the ACDelco Technical Delivery System (TDS) web portal to purchase General Motors training and support materials. After logging in to the ACDelco TDS portal, click “online store” to browse our training products.
Due to vehicle security requirements, key codes and immobilizer codes are available to active members of the National Automotive Service Task Force Vehicle Security Registry with a valid Locksmith ID (LSID) and Passcode. An active LSID and Passcode must be included in your ACDelco TDS registration profile to request Key Codes or Immobilizer codes. Visit for more information on becoming a member of the NASTF Vehicle Security Registry.
The General Motors web portal for the independent repair center to purchase genuine General Motors service information, diagnostic scan tool software and service programming software.
TIS2Web, the next-generation Technical Information System, is web-based so you can always access the most current General Motors vehicle control module calibrations, Tech 2 software updates, Global Diagnostic System 2 and Tech2Win. (System Requirements )
Access to the latest electronic controller calibration information for GM vehicles. Calibration history can be looked up at no charge.