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Service bulletin GCUS-3-644

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 id10126136
Published by NHTSA2017-12-22
Manufacturer's numberGCUS-3-644
Manufacturer's date2016-08-05
NHTSA componentSTEERING

NHTSA's summary

17200 - Customer Satisfaction. Certain vehicles, may have a condition in which an intermittent or lasting loss or reduction of power steering assist may occur at startup or while driving.

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

Steering

Vehicles listed
CHEVROLET IMPALA2014

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

Recalls for the same vehicles and component
20145142014-11-12. Steering
14V4500002014-07-23. STEERING:ELECTRIC POWER ASSIST SYSTEM
14V4090002014-07-02. STEERING

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
PI0281L2025-06-12. Service bulletin. This preliminary informational (PI) bulletin provides information to dealership personnel that may be helpful when addressing underbody component corrosion with customers.
16-NA-1092025-02-28. Service bulletin. This service bulletin provides a procedure inspecting for excess grease or Sealant on the Exterior of the steering gear due to seeing grease or sealant on certain locations on the gear.
04-06-01-029K2024-12-04. Service bulletin. This informational bulletin explains Unscheduled Supplemental Services and the importance of GM Simplified Maintenance Schedules.
PI0659D2024-04-29. Service bulletin. Groan, Squeak or Rubbing Type Noise When Turning Steering Wheel
PI0659C2024-04-29. Service bulletin. Groan, Squeak or Rubbing Type Noise When Turning Steering Wheel.
15NA0902024-02-12. Service bulletin. Power Steering Cooling Lines and/or Engine Oil Cooler Line
143782024-01-16. Service bulletin. Steering Assembly Bolt Not Properly Torqued
143302024-01-16. Service bulletin. Loss of Power Steering Assist
PIT5063C2023-12-26. Service bulletin. Service Steering Message or Service Stability Message.
PIT5063C2023-12-11. Service bulletin. Service Steering Message or Service Stability Message.