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Service bulletin 23-NA-201

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 id10247549
Published by NHTSA2023-12-21
Manufacturer's number23-NA-201
Manufacturer's date2023-12-14
NHTSA componentEQUIPMENT:ELECTRICAL; ELECTRICAL SYSTEM; STEERING:ELECTRIC POWER ASSIST SYSTEM; STEERING; SERVICE BRAKES, HYDRAULIC; SERVICE BRAKES, HYDRAULIC:POWER ASSIST

NHTSA's summary

This service bulletin advises the technician of a possible loose ground that may be causing customer concerns of Loss of Steering Assist and/or Loss of Brake Assist and Malfunction Indicator Lamp (MIL) Illuminated.

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

Brakes, Electrical system, Equipment and accessories, Steering, Power steering

Vehicles listed
CHEVROLET SILVERADO 15002019, 2020, 2021, 2022 (the catalog's model; the bulletin names a series or trim of it)
GMC SIERRA 15002019, 2020, 2021, 2022 (the catalog's model; the bulletin names a series or trim of it)

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
N2223765802023-02-06. Service bulletin. Service Update - Certain vehicles may have a condition in which the Power Assist Steps reverse while deploying or stowing. Dealers will reprogram the Assist Step Control Module.
PIT56452019-03-18. Service bulletin. This Preliminary information communicates and issue with a Service Power Steering Message DTC C144B or Clunk Noise At Full Steering Lock Turns AFTER Installation Of Accessory Lift Kit. GM Engineering is working on updated calibrations for the power steering control module to correct these issues.
PIT5544B2018-11-13. Service bulletin. This Preliminary information communicates information on ahydrauilc rush type noise from the power steering gear. This noise is a characteristic of the new Active Hydraulic Assist System RPO NV8 and no repairs should be made. The noise is most noticeable in the cab at idle, in park, with all accessories turned off.