PIE0778

Subject:
Engineering Information - Steering Loss of Assist While Driving Without Setting Any DTCs that Indicate a Failure and
Remedial Action to Take at the Dealership
Attention:
Proceed with this EI ONLY if the customer has commented about this concern AND the PIE number is listed in the
Global Warranty Management / Investigate History link (GWM/IVH). If the customer has not commented about this
condition or the EI does not show in GWM/IVH, disregard the PIE, and proceed with diagnostics found in published
service information. THIS IS NOT A RECALL refer to Service Bulletin 04-00-89-053 for more details on the use of
Engineering Information bulletins.
Brand:
Cadillac
Model:
Model Year:
LYRIQ
VIN Breakpoint:
from
to
from
to
2023
2024
—
—
Engine:
Transmission:
—
—
Involved Region or Country
U.S. Dealers ONLY
Condition
Some customers may comment on steering loss of assist while driving.
Technicians may find NO DTCs set.
GM Engineering is attempting to determine the root cause of the above condition. Engineering has a need to
gather information on vehicles PRIOR to repair that may exhibit this condition. As a result, this information will
be used to "root cause" the customer's concern and develop/validate a field fix.
Cause
Correction
Important: This engineering information (EI) can only be completed by certified repair facilities who have met all specific training, tool and equipment
requirements pertaining to the vehicle Brand and Model serviced. Repairs must be performed by a technician who has successfully completed the required
training.
Important: Service agents must comply with all International, Federal, State, Provincial, and/or Local laws applicable to the activities it performs
under this bulletin, including but not limited to handling, deploying, preparing, classifying, packaging, marking, labeling, and shipping
dangerous goods. In the event of a conflict between the procedures set forth in this bulletin and the laws that apply to your dealership, you must
follow those applicable laws.
If you encounter a vehicle with the above concern, perform the following steps and contact one of the engineers listed below with your findings:
1.
Capture the GDS2 vehicle DTC and ID information report for the following.
•
•
•
•
•
•
•
2.
Power Steering Soft-tops Learn Status
Steering Wheel Angle Sensor Calibration Status
Battery voltage
Application Software Identification
Calibration Identification Record
Power Steering Level X Malfunction Ignition Cycle Counter
Power Steering Motor Overload Protection Counter
Capture details for the power steering control module 1 and 2
Contact Information
The Contact Information has been redacted.
1
Please include the following information if leaving a message:
–
Technician name
–
Dealer name and phone number
–
Complete VIN and repair order (R.O) number
On the repair order, document the date and time the call was placed (even if the engineer was not reached).
If engineering is unable to return the call within one hour, proceed with diagnosis and repair based on information found in SI.
Warranty Information
If an engineer was contacted or required information was provided, use:
Labor Operation
Description
Labor Time
2886938*
Engineering Information - Steering Loss of Assist While Driving Without
Setting Any DTCs
0.4 Hrs.
*This is a unique Labor Operation for bulletin use only.
Version
1
Modified
Released February 16, 2024
2