NHTSA ID Number: 10227663
Manufacturer Communication Number: PIP5824B
TSB/Document Date: 2022-12-12
Summary
This Preliminary information communicates a possible issue with the active fuel management rockers causing a misfire and the correction for this concern.
Bulletin No.: PIP5824B
Published date: 11/10/2022
Preliminary Information
PIP5824B HFV6 Gen2 Engine Mis re On AFM Cylinders 2 or 5
Models
Brand:
Model:
Model Years:
VIN:
from
to
Engine:
Transmissions:
CT5
2021 - 2023
All
All
3.0 LGY
All
XT5
2021 - 2023
All
All
3.6 LGX
All
XT6
2021 - 2023
All
All
3.6 LGX
All
Blazer
2021 - 2023
All
All
3.6 LGX
All
Camaro
2021 - 2023
All
All
3.6 LGX
All
Colorado
2021 - 2022
All
All
3.6 LGZ
All
Acadia
2021 - 2023
All
All
3.6 LGX
All
Canyon
2021 - 2022
All
All
3.6 LGZ
All
North America, Europe, Uzbekistan, Russia, Middle East, Iraq, Israel, Palestine,
Argentina, Brazil, Bolivia, Chile, Colombia, Ecuador, Paraguay, Peru, Uruguay,
Involved Region or Country Venezuela, Japan, Cadillac
Korea (South Korea), GM Korea Company, China, Taiwan,
Thailand, Singapore, Philippines, Australia/New Zealand, Egypt, Other Africa, South
Africa
A 2021 - 2023 vehicle equipped with a HFV6 Gen2 engine with AFM may be brought
into the dealership with mis res on cylinder 2 or 5 and may be accompanied by a
rough idle complaint.
Condition
This could be mis re all the time or start after an AFM event that may or may not go
away.
This will be a very low mileage concern usually between 2 miles and 1500 miles.
Cause
We have determined there is an issue with some rockers / SRFF's on the vehicles
within Model Years listed above.
Correction:
If you have a vehicle with this concern, swap the AFM rocker oil control solenoid in the camshaft cover from side
to side and reevaluate.
If the mis re goes away or moves to the other bank, replace the AFM oil control solenoid.
If the mis re remains or comes back after an AFM event on the same cylinder, remove that bank camshaft cover
and turn the engine over by hand while closely watching the valves on the mis ring cylinder.
If the cylinder was a dead mis re all the time and the valves open, continue with normal mis re diagnosis.
If the valves do not open(either intake or exhaust) replace all 4 rockers / SRFF's and all 4 SHLA's / lifters for the
a ected cylinder.
NOTE: This PI will be updated or changed to a bulletin when engineering has decided there is no longer a parts
concern with these rockers or a new part comes out.
Parts Information
Description
Part Number
QTY.
Switching valve rocker arm
Dual Feed Hydraulic Lash Adjuster
12666601
12690246
4
4
Warranty Information
For vehicles repaired under the Powertrain coverage, use the following labor operation.
Reference the Applicable Warranties section of Investigate Vehicle History (IVH) for coverage
information.
Please use the Labor Operation for the vehicle and bank you are working on.
Additional SI Keywords
DTC, P0300, P0302, P0305,
Version History
Version 3
Modi ed
3
09/22/2021 - Created on.
02/25/2022 - Updated to add MY and remove breakpoint
11/10/2022 - Updated to add MY
© 2022 General Motors. All Rights Reserved.
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TSB/Document ID: PIP5824B
Replacement Service Bulletin Number:
MFR Communication Date: 2022-11-10
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: FUEL SYSTEM, OTHER
MFR Component System:
MFR Component Subsystem:
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