NHTSA ID Number: 11006711
Manufacturer Communication Number: 21-NA-280
TSB/Document Date: 2024-08-30
Summary
This service bulletin provides diagnostic repair information for customer concerns of Engine Run-On, Rough Running, Malfunction Indicator Lamp (MIL) Illuminated.
Bulletin No.: 21-NA-280
Service Bulletin
Date: August, 2024
INFORMATION
Subject:
Information on Engine Run-On, Rough Running, Malfunction Indicator
Lamp (MIL) Illuminated - DTC P0172 Set
This Service Bulletin replaces PIP4783B. Please discard all version of PIP4783.
Brand:
Model:
LaCrosse
Buick
Model Year:
VIN:
from
to
2010
2012
from
Engine:
to
2.4L (LAF, LEA)
Regal
2011
2011
2.4L (LAF)
Verano
2012
2017
2.4L (LEA)
Captiva
2012
2016
Equinox
2010
2017
2.4L (LAF, LEA)
Orlando
2012
2014
2.4L (LAF, LEA)
Terrain
2010
2017
2.4L (LAF, LEA)
Involved Region or Country
—
—
2.4L (LAF, LEA)
—
North America, Russia, Middle East, Iraq, Israel, Palestine, Thailand
Some customers may comment on one or more of the following conditions:
• Engine run-on
Condition
• Rough idle
• MIL illuminated
Technicians may find DTC P0172 set in the Engine Control Module (ECM).
Cause
This condition may be caused by fuel contamination in the crankcase.
- This may be a result of the high-pressure fuel pump leaking fuel into the crankcase
when the plunger is depressed.
If this concern is encountered, perform SI diagnosis and repair as necessary.
• If SI diagnosis does not isolate the cause of this concern, check the low side fuel pressure leakdown with a mechanical gauge as outlined in SI Fuel System Diagnosis.
Correction
• If fuel pressure leakdown is present with the J-37287 Fuel Line Shut-off Adapter installed and closed, follow the SI Fuel Pump Replacement Procedure to replace the highpressure fuel pump.
Also change the engine oil and filter to complete the repairs.
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.
Version
2
Modified
Released November 29, 2021
Revised August 08, 2024 – Added Chevrolet Orlando to Models, additional Regions/
Countries, and the Important statement.
GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these
WE SUPPORT VOLUNTARY
technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper
TECHNICIAN
service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job
CERTIFICATION
properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your
vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the
Copyright 2024 General Motors. All Rights Reserved.
information.
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TSB/Document ID: 21-NA-280
Replacement Service Bulletin Number:
MFR Communication Date: 2024-08-08
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ENGINE
MFR Component System:
MFR Component Subsystem:
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