PI 2027 Sierra 1500 Fact That Multiple Parts for This Vehicle Are on a Part Restriction — PIT6559

[AT4Forum]

Preliminary information · Preliminary information PIT6559

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: Oct 16, 2026
Applies to: Sierra 1500 (2027 model year)

Summary (official text)​

This Preliminary Information communicates the fact that multiple parts for this vehicle are on a part restriction. Dealers are directed to check EPC for restriction notes and that it will require additional processes to obtain a restricted part.

Sources​

• PIT6559 (PDF, NHTSA document 11038594) — Oct 16, 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.

 

AT4 Forum Fav 👍

Air Lift 89388 LoadLifter 5000 Ultimate Plus Air Suspension Kit - Grab one through Amazon!