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Service bulletin PIE0778A

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 id11001779
Published by NHTSA2024-06-18
Manufacturer's numberPIE0778A
Manufacturer's date2024-05-23
NHTSA componentSTEERING

NHTSA's summary

This engineering information (EI) closure ends the need for gathering further information from technicians in regard to steering loss of assist 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
CADILLAC LYRIQ2023, 2024
CADILLAC LYRIQ EV2023 (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
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.
25-NA-0652025-04-24. Service bulletin. This informational bulletin instructs the tech when fuel/fluid is needed to be tested and where it can be sent for analysis.
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.
N2424521102024-12-04. Service campaign. Service Update. On certain vehicles, while Super Cruise is engaged, DTC B19F2 (steering wheel touch sensor fault) could occur. Dealers will replace the steering wheel.
PIE07782024-02-28. Service bulletin. This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer listed in regard to steering loss of assist while driving.
03-00-91-001I2023-11-22. Service bulletin. This service bulletin provides a vibration analysis worksheet the technician can use in conjunction with the appropriate Vibration Analysis-Road testing procedure when diagnosing vibration concerns.
PIC6493A2023-09-18. Service bulletin. This Preliminary information communicates that the steering wheel maybe contacting the column covers and to inspect for the turn signal switch bracket to be correctly installed on the steering column.
15-00-89-004F2023-09-08. Service bulletin. This service bulletin provides technicians with updated information to help identify the differences between what is considered a fluid leak, and what is considered fluid seepage.
23-NA-1202023-07-25. Service bulletin. This service bulletin provides a procedure to correct a condition of Lower Steering Wheel Controls Inoperative, DTC B1A37.
PIE0752A2023-07-12. Service bulletin. This engineering information (EI) closure ends the need for gathering further information from technicians in regard to the steering wheel button for the cruise control and/or radio control are not responding when pressed.