PIE0554A

Subject:
Engineering Information – Instrument Panel Cluster (IPC) Gages at Zero, Multiple Warning Lights On, No Chimes
and/or Turn Signal Audio
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 PI 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 LD
Model Year:
VIN:
from
to
from
to
2019
2020
-
-
Engine:
Transmission:
-
-
2019
Silverado
2500/3500
Suburban
2020
Tahoe
GMC
Sierra Limited
2019
Sierra 2500/3500
Yukon Models
2020
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 one or more of the following conditions.
•
Instrument panel cluster (IPC) gages at zero.
•
Multiple warning lights on.
•
No chimes and/or turn signal audio.
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
If you encounter a vehicle with the above concern, perform the following steps below and contact the engineer listed with your findings. If the vehicle is within 10 miles
of the Warren Tech Center, the engineer wants the technician to wait until his arrival BEFORE doing anything to the vehicle.
1.
Pull the K56 serial data gateway module, wait 1 minute and reinstall the fuse. Check to see if the issue is fixed.
2.
Inspect the crimps at the K56 serial data gateway module connectors at the fuse box. If the crimps appear loose and/or not secure, repair or replace as
needed and check to see if the issue has been fixed.
3.
Inspect the contacts in the dash fuse box. If the contacts appear loose and/or not secure, repair or replace as needed and check to see if the issue has been
fixed.
4.
Disconnect the two K56 serial data gateway module connectors and conduct the following:
4.1.
Check for any backed out terminals in the harness connectors including bent pins in the K56 serial data gateway module header. If required, fix the
1
backed out terminals and bent pins then check to see if the issue is fixed by reconnecting the harnesses to the modules.
item
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
3486998*
Engineering Information – Instrument Panel Cluster Gages at Zero, Multiple
Warning Lights On, No Chimes
0.4 hr
* This is a unique labor operation for bulletin use only.
Version
2
Modified
Released February 13, 2020
Revised March 05, 2020 – Updated the Correction information for Steps 1, 2,4 and 4.1.
2