View GM Service Information (GMSi) vehicle diagnostic and service repair manuals at ACDelco


GM Service Information (GMSi) is a comprehensive collection of vehicle diagnostic and service repair manuals for GM vehicles. This web-based subscription service helps maximize productivity and grow your business by efficiently performing service repairs and controlling costs.


  • GM Vehicle Diagnostic Service (1998-present)
  • Collision Repair Manuals (1998-present)
  • Frame sectioning information, panel replacement procedures and recall information
  • Campaigns, service bulletins and preliminary information for GM (1980-present)
  • GM Owner’s Manuals and glove box supplements (2003-present)
  • Easy-to-use keyword/document/number search


  • $20 for 3 days
  • $150 per month
  • $1,200 per year
  • $900 – Perks+ and Pro Perks++ Partners are eligible for a discounted price of $900 per year (regularly $1,200)
  • CONNECTION users can receive GMSi at no charge by purchasing a minimum monthly target of ACDelco parts. Learn more about this incentive
  • GMSi program benefit is not available to subscribers in Massachusetts

Explore Shop Tools
Sign In To ACDelco Connection
Buy Parts Online At ACDelco