PI 2026 Sierra 2500HD/Sierra 3500HD Unknown or Other — PIP6131

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Preliminary information · Preliminary information PIP6131

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 14, 2026
Applies to: Sierra 2500HD, Sierra 3500HD (2026 model year)

Summary (official text)​

This Preliminary Information (PI) relays to dealer technicians to replace the engine and turbocharger if there is a lack of lubrication to the rocker arms or rocker arm components.

Sources​

• PIP6131 (PDF, NHTSA document 11036220) — Aug 14, 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 truck? Let us know your model year and engine, plus any diagnosis or repair details.

 

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