PI 2019 Sierra 2500HD/Sierra 3500HD Unknown or Other — PIP6133

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Preliminary information · Preliminary information PIP6133

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 2500HD, Sierra 3500HD (2019 model year)

Also listed in the source (outside this forum's coverage): Sierra 2500 2017–2018, Sierra 3500 2017–2018

Summary (official text)​

This PI was created to help address the correct repair regarding a low coolant message on the DIC

Sources​

• PIP6133 (PDF, NHTSA document 11037560) — 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 truck? Let us know your model year and engine, plus any diagnosis or repair details.

 

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