PIP5731

Bulletin No.: PIP5731
Published date: 10/7/2020
Preliminary Information
PIP5731 Cylinder Deactivation Performance DTC(s) P3498, P3499,
P349A, P349B, P349C, P349D, P349E, or P349F may be stored in
history and not active
Models
Brand:
Model:
Model Years:
VIN:
from
Engine:
to
Transmissions:
Cadillac
Escalade
2021
All
All
6.2 L87
All
Chevrolet
Suburban
2021
All
All
5.3 L84 6.2 L87
All
Chevrolet
Tahoe
2021
All
All
5.3 L84 6.2 L87
All
GMC
Yukon
2021
All
All
5.3 L84 6.2 L87
All
Involved Region or Country North America
Condition
During inspection of the vehicle for an unrelated concern the technician may notice
that one or more of the following Cylinder Deactivation Performance DTC(s) P3498,
P3499, P349A, P349B, P349C, P349D, P349E, or P349F may be set in history. and not
requesting MIL. If any of these DTCs are requesting the MIL, please follow
appropriate service information for diagnosis & repair.
Cause
This condition may be caused by the ECM hardware disabling the cylinder
deactivation outputs for an ignition cycle due to low voltage transient during crank &
inadvertently causing one of the DTCs to set during an ignition cycle.
Correction:
If a vehicle comes in with one of these DTC(s) and there are no concerns with the cylinder deactivation system, it
will be necessary to clear the DTC(s) and perform a road test to ensure they do not return. The road test should
include driving at 30-45 mph with the engine fully warmed up and on a at road. Do not replace any parts for this
concern unless the vehicle is exhibiting and issue with the cylinder deactivation system. If any one of these DTC(s)
returns refer to the applicable DTC(s) in service information and diagnose accordingly. Engineering is working on
a solution to ensure these DTC do not set unintentionally.
When a repair becomes available this PI will be updated to a bulletin.
Version History
Version
Modi ed
1
06/08/2020 - Created on.
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