NHTSA ID Number: 11005351
Manufacturer Communication Number: 23-NA-142
TSB/Document Date: 2024-07-31
Summary
This technical bulletin provides a procedure for the techs to replace the forward check ball and separator plate if found the cause of the customers concern of No Forward Gear When Shifting from Park to Drive and/or Reverse to Drive.
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TSB/Document ID: 23-NA-142
Replacement Service Bulletin Number:
MFR Communication Date: 2024-07-18
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: POWER TRAIN
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
Bulletin No.: 23-NA-142
Service Bulletin
Date: July, 2024
TECHNICAL
Subject:
Brand:
No Forward Gear When Shifting from Park to Drive and/or Reverse to
Drive
Model:
Model Year:
from
3500/4500 Medium
Duty (LCF)
to
VIN:
from
Engine:
to
2016
Camaro
2023
Colorado
Corvette
2015
Express
Silverado 1500
Silverado 1500
(New Model)
2019
2019
Silverado 2500HD/
3500HD
2019
2023
Silverado LD
2019
2019
Silverado 1500
2020
2021
2022
2022
Silverado 1500 LTD (RPO J21, VIN
Digit 5 = W/Y)
Silverado 1500 New (RPO J22, VIN
Digit 5 = A/D)
Silverado 1500
Suburban
Tahoe
Canyon
6L90 (MYD),
6L50 (MYB),
6L80 (MYC)
2023
2015
2023
2015
2023
Sierra 1500
2015
2018
Sierra 1500 (New
Model)
2019
2019
Sierra 2500HD/
3500HD
2019
2023
Sierra Limited
2019
2019
Sierra 1500
2020
2021
2022
2022
Savana
2018
Sierra 1500 - Limited (RPO J21, VIN
Digit 5 = 8/9)
Sierra 1500 - New
(RPO J22, VIN Digit
5 = H/U)
Copyright 2024 General Motors
. All Rights Reserved.
Page 2
Brand:
July, 2024
Model:
Model Year:
from
to
Sierra 1500
2023
2023
Yukon Models
2015
2023
Bulletin No.: 23-NA-142
VIN:
from
Engine:
to
Involved Region or Country
North America
Condition
Some customers may comment that the vehicle won’t move forward after shifting into
Drive from Park or Reverse.
Some customers may also comment that reverse appears to work properly.
Note: Once moving in drive. There should be no concern until the next shift cycle.
Cause
This condition may be caused by a Spacer Plate in the valve body that does not meet the
specification for chamfer across the entire circumference of the coined check ball seat.
6404748
6404809
Bulletin No.: 23-NA-142
July, 2024
Page 3
- The seat for the check ball is out of spec relative to coin depth. This potentially can
cause burrs, dents, or dings, which could cause the plastic check ball to wear prematurely.
Note: School buses, some of which shift to Park at each student stop, may exhibit the
earliest signs of failure.
- The #1 check ball has a high duty cycle and when combined with the issue, there is a
possibility for the check ball to wear and then become stuck or pass through the
spacer plate.
6404322
- As indicated in the graphic above, the check ball circled in RED has prematurely worn
down. It should be the same diameter as the check ball circled in GREEN.
Correction
Replace the spacer plate and check ball.
Parts Information
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.
Causal
Part
Description
Part Number
Qty
X
PLATE PKG,
C/VLV BODY
SPCR
(INCLUDES
C/VLV BODY
BALL CHK)
24272467
1
N/A
FLUID, TRANSMISSION
Refer to EPC
As Required
Service Procedure
Warranty Information
Refer to Control Valve Lower Body and Upper Body
Replacement in SI..
For vehicles repaired under warranty, use:
Labor Operation
Description
Labor Time
8463870
Control Valve Lower Body and Upper Body Replacement
Use the Published Labor
Operations Time
Page 4
July, 2024
Bulletin No.: 23-NA-142
Version
3
Modified
Released September 15, 2023
Revised May 24, 2024 - Added Additional Models and Model Years.
Revised July 16, 2024 - Added 6L50 (MYB) and 6L80 (MYC) to Engine section.
GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these
technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper
service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job
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
information.
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