PI 2019–2027 Sierra 1500/Sierra 2500HD/Sierra 3500HD/Yukon/Yukon XL/Canyon Diagnostics Tips on How the LIN Bus Works and How to Diagnosis It — PIT5698

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Preliminary information · Preliminary information PIT5698

This is a preliminary information note, not a recall. GMC sends these to dealer technicians about a known condition, often while a fix is still being worked out. They are not repair orders, and they don't by themselves change what is covered.

Published: Sep 26, 2026
Applies to: Sierra 1500: 2019–2026 · Sierra 2500HD: 2019–2026 · Sierra 3500HD: 2019–2026 · Yukon: 2019–2027 · Yukon XL: 2019–2027 · Canyon: 2019–2026

Also listed in the source (outside this forum's coverage): 3500HD 2024, Acadia 2013–2027, Canyon 2013, 2015–2018, Envoy 2013, G3500 2017–2018, Hummer EV Pickup 2022–2026, Hummer EV SUV 2024–2026, Savana 2013–2026, Savana 1500 2013–2017, Savana 2500 2013–2018, 2023, 2025–2026, Savana 3500 2013–2018, 2023, 2025–2026, Savana 4500 2026 and 15 more

Summary (official text)​

This PI provides Diagnostics tips on how the LIN bus works and how to diagnosis it.

Sources​

• PIT5698F (PDF, NHTSA document 11037555) — Sep 26, 2026

Details from NHTSA as of Oct 22, 2026. If NHTSA or GMC revises this notice, this post is updated and significant changes are noted in a reply. The linked documents are the authority, and a dealer can confirm whether it applies to your VIN.

Have you experienced this issue with your vehicle? Let us know your model year and engine, plus any diagnosis or repair details.

 

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