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Service bulletin PIT5587A

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10129883
Published by NHTSA2018-03-12
Manufacturer's numberPIT5587A
Manufacturer's date2018-02-12
NHTSA componentELECTRICAL SYSTEM:SOFTWARE

NHTSA's summary

This preliminary information explains that there is a software issue causing the driver mode switch to not change modes , that engineering has released new calibrations to address this concern.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system, Software

Vehicles listed
GMC TERRAIN2018

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
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19NA2492020-08-31. Service bulletin. This technical bulletin provides repair information to correct a customer concern of Radio Favorites Grayed Out or Unavailable at Times.
19NA2492020-08-10. Service bulletin. This technical bulletin provides repair information to correct a customer concern of Radio Favorites Grayed Out or Unavailable at Times.
20NA0942020-05-26. Service bulletin. This informational bulletin provides information on the Steering Assist Reduced, Service Stabilitrak and/or Park Brake Released message being displayed on the Instrument Panel Cluster (IPC) due to low voltage being received by the brake or Power Steering Control Module.