General Motors
Automotive · Last assessed 6/9/2026
Score breakdown
Why this grade
Legacy OEM with a deep parts and service-information ecosystem: ACDelco/GM service information is subscription-available to independents, OEM parts flow through ACDelco plus a large aftermarket, and GM is bound by the July 2023 ASA/SCRS/Auto Innovators commitment that 'independent repair facilities shall have access to the same diagnostic and repair information that auto manufacturers make available to authorized dealer networks.' Drags: GM (via the Alliance for Automotive Innovation) spent years challenging Massachusetts' telematics R2R expansion, and in December 2024 U.S. senators publicly called automakers' R2R opposition 'hypocritical,' singling out the telematics/data-control posture (OnStar). Strong parts/info access but an adversarial telematics record keeps software-lock and friendliness scores down.
Methodology & version
Five dimensions — parts availability, schematic access, repairability, OEM pricing, and software freedom — are scored 0–100 and weighted equally; the letter grade is the average (A 90–100, B 80–89, C 70–79, D 60–69, F below 60). This assessment is current as of 6/9/2026 and cites its sources below. It covers the Automotive category and is not a claim about every device the maker ships.