PI 2024–2026 Sierra 1500/Sierra 2500HD/Sierra 3500HD/Yukon/Yukon XL/Canyon Diagnostic Tip If a Technician Loses Communication with the Image… — PIT6541

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Preliminary information · Preliminary information PIT6541

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: Aug 27, 2026
Applies to: Sierra 1500, Sierra 2500HD, Sierra 3500HD, Yukon, Yukon XL, Canyon (2024–2026 model years)

Also listed in the source (outside this forum's coverage): 3500HD 2024, Acadia 2024–2027, Hummer EV Pickup 2024–2026, Hummer EV SUV 2024–2026, Savana 2024–2026, Savana 2500 2025–2026, Savana 3500 2025–2026, Savana 4500 2026, Savana Cutaway VAN 2024, Sierra EV 2024–2026, Terrain 2024–2027

Summary (official text)​

This Preliminary information communicates to the technicians a diagnostic tip if a technician loses communication with the image processor #2 and how to restore communication

Sources​

• PIT6541 (PDF, NHTSA document 11036690) — Aug 27, 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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