PIE0599

Subject:
Engineering Information - Airbag Lamp Illuminated On Driver’s Information Center (DIC), DTCs B0001, B0002 Set
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:
Model:
Cadillac
Escalade Models
Chevrolet
Silverado 1500
Model Year:
VIN:
from
to
from
to
2021
2021
-
-
Engine:
Transmission:
-
-
Silverado 2500HD/3500HD
Suburban
Tahoe
GMC
Sierra 1500
Sierra 2500HD/3500HD
Yukon Models
Involved Region or Country
North America
Condition
Important: If the customer did not bring their vehicle in for this concern, DO NOT proceed with this EI.
Some customers may comment on the airbag lamp illuminated on the driver’s information center (DIC).
Technicians may find the following DTC’s set.
Cause
•
B0001 - Steering Wheel Module Stage 1 High Control
•
B0002 - Steering Wheel Module Stage 2 High Control
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.
Correction
If you encounter a vehicle with the above concern, inspect where the resistance spikes are seen/go away within the airbag module system, following the steps listed
below and contact one of the engineers with your findings.
1.
Remove the top and bottom steering column shrouds. Refer to Steering Column Shroud Replacement in SI.
2.
Use a MDI tool and plug it into the (ADL) to show a profile of the resistances.
1
Note: Example shown above of a High Resistance spike that should be seen to indicate high resistance.
3.
2.1.
Turn the steering wheel all the way to the right, then all the way to the left, and observe any spikes seen on any resistances.
2.2.
Jerk/pulse the steering wheel left and right when the steering wheel is at absolute center, then fully turn the steering wheel to the left then fully turn to
the right and observe any spikes seen on any resistances.
Remove the complete steering column and get with engineering about shipping the steering column back. Refer to Steering Column Replacement in SI.
Contact Information
The Contact Information has been redacted.
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 engineer was contacted or required information was provided, use:
Labor Operation
Description
Labor Time
7481998*
Engineering Information - Airbag Lamp Illuminated On (DIC), DTCs B0001,
B0002 Set
2.6 hr
* This is a unique labor operation for bulletin use only.
Version
1
Modified
Released November 16, 2020
2