Starting January 1, 2026, GM TechlineConnect will only support Windows 11 Professional 64bit.
Automotive Diagnostic News Alerts
ACDelco tds is down as of Jan 27, 2026 8:00am ET. GM is working on the issue, but there is currently no timeline for a resolution.
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Jan 27, 2026 1:00pm PST ACDelco tds restored and function