PIP5675

Bulletin No.: PIP5675
Published date: 09/10/2019
Preliminary Information
PIP5675 MIL illuminated with DTC P1098 and/or P26BB
Models
Brand:
Model:
Model Years:
VIN:
from
to
Engine:
Transmissions:
Cadillac
XT4
2019 - 2020
All
All
2.0L LSY
All
Chevrolet
Silverado 1500 (New Model)
2019 - 2020
All
All
2.7L L3B
All
GMC
Sierra 1500 (New Model)
2019 - 2020
All
All
2.7L L3B
All
Involved Region or
Country
Condition
Cause
North America
Some customers may comment that the MIL light is illuminated. The technician may
nd P1098 and/or P26BB set current or history.
This may be caused by a software anomaly, GM is currently looking into the issue.
Correction:
Check VIN history to determine if one or both of these codes have previously set in the ECM.
If the vehicle has set either code previously, replace the Coolant Flow Control Valve.
If the vehicle has not set either code previously, perform the latest SI diagnostic for the
code.
If the SI diagnostic fails to isolate the root cause, do not replace the Coolant Flow Control
Valve.
Clear any codes and return the vehicle to the customer.
If either code is set current, and the SI diagnostic isolates the root cause to the Coolant Flow
Control Valve, replace the valve and perform the scan tool control function: Engine Coolant
Control Valve Mode.
The value should increase and decrease according to the command in the scan tool.
Clear any codes and return the vehicle to the customer.
In the event that the customer returns with either DTC set a second time, replace the valve
and perform the scan tool control function: Engine Coolant Control Valve Mode.
Version History
Version
1
Modi ed
09/10/2019 - Created
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