NHTSA ID Number: 10228225
Manufacturer Communication Number: 22-NA-246
TSB/Document Date: 2022-12-23
Summary
This service bulletin advises the technician that the possible cause may not be from a faulty clutch piston or extension housing and to perform testing on transmission for possible other issues, but it still may be possible on high mile vehicles that orifices in housing may have come dislodged, causing the same customer concern.
Bulletin No.:
Service Bulletin
Date:
22-NA-246
December, 2022
INFORMATION
Subject:
Brand:
Information on Unnecessary Replacement of Extension Housing and 1-2-3-4-5-REV
Clutch Piston Assembly for 8L45, 8L90 Automatic Transmissions
Model:
Model Year:
VIN:
from
to
Engine:
from
to
ATS
2016
2019
M5N,
M5T, M5U
CT4
2020
2022
M5N
CT6
2016
2018
M5N, M5X
CTS
2016
2019
M5N, M5U
Escalade
Models
2015
2017
M5U
Camaro
2016
2021
M5T, M5U
Colorado
2017
2022
M5T, M5U
Corvette
2015
2019
M5U
Express
2017
2020
M5U, MQD
Silverado
2015
2018
M5U, M5X
Silverado
1500 (New
Model)
2019
2019
2020
2021
—
—
—
Silverado LD
Chevrolet
Silverado
1500
Silverado
1500 - LTD
(RPO J21,
VIN Digit 5 =
W/Y)
Silverado
1500 - New
(RPO J22,
VIN Digit 5 =
A/D)
Suburban
Tahoe
MQE, M5X
2022
2022
2015
2017
Copyright 2022 General Motors LLC. All Rights Reserved.
M5U
Page 2
Brand:
December, 2022
Model:
Canyon
Savana
Sierra
Sierra 1500
(New Model)
Sierra
Limited
Sierra 1500
Sierra 1500 Limited (RPO
J21, VIN
Digit 5 = 8/9)
Sierra 1500 New (RPO
J22, VIN
Digit 5 = H/U)
Yukon
Models
Involved Region or Country
Condition
Model Year:
Bulletin No.: 22-NA-246
VIN:
from
to
2017
2022
2015
2018
2019
2019
2020
2021
from
to
Engine:
Transmission:
M5T
M5U, MQD
M5U, M5X
—
—
—
MQE, M5X
2022
2022
2015
2017
M5U
North America, Middle East
Some technicians may see normal witness marks that lead them to condemn the
extension housing and 1-2-3-4-5-REV clutch piston assembly.
Important: Several of these components were returned for an engineering investigation
into the witness marks found on the extension housing and the 1-2-3-4-5-Rev clutch
piston assembly. Engineering has verified that components with these marks are not the
cause of harsh shifting concerns. The components should not be replaced due to the
witness marks. The 1-2-3-4-5-REV clutch piston is an applied clutch in Park, Neutral,
Reverse, and the 1st, 2nd, 3rd, 4th, and 5th gear ranges.
Although these components should not be replaced for these witness marks,
another concern was found during the investigation with the components
returned from transmissions that had accumulated higher mileage.
This condition may apply to high mileage vehicles where it is possible to find one or both
orifices missing in the 1-2-3-4-5-REV clutch piston.
Cause
6201397
The orifices are normally staked into the two passages and may become dislodged
during time.
Bulletin No.: 22-NA-246
December, 2022
Page 3
6204833
Extension housing bore showing witness marks related to the O-ring seal from the 1-2-34-5-REV clutch piston. These two witness marks are always located in the same general
area, almost directly across from the fluid entry ports into the extension housing.
6201402
Page 4
December, 2022
Bulletin No.: 22-NA-246
The extension housing should not be replaced if witness marks are left by the piston
assembly.
– If either of the orifices have become dislodged, the extension housing and
1-2-3-4-5-REV piston assembly will require replacement.
6204566
This triangle shaped boss on the 1-2-3-4-5-REV clutch piston acts as a stop, to not allow
the piston to rotate when engaged. Over time, the boss will become polished on the side
and matching marks will be in the area on the extension housing. Engineering has
investigated and confirmed that the O-ring and boss markings have no ill effect on
transmission shift quality.
Note: Technicians should always road test vehicle in the same manner that the customer
is defining in their concern when it can be done safely and in accordance with all State/
Provincial and Federal vehicle operating laws and within the speed limit as allotted by
road conditions
Information
If the technician can duplicate the concern, an initial inspection of the vehicle should be
performed first.
– Once the technician has verified there are no visible concerns or fluid leaks found,
check service information (SI) for any bulletins on the concern:
• Bulletin 22-NA-182 refers to possible twisted cooler lines that can cause a harsh shift
concern.
• Bulletin 16-NA-361 addresses customer concerns with an initial harsh 1-2 shift after
the vehicle has sat for at least four hours.
• Bulletin 22-NA-122 should also be reviewed for description and operation of the
transmission.
If the technician cannot identify any obvious causes of the customers concern, the next
step will be to verify the transmission fluid level is as specified in the service information,
making sure to have the vehicle at the correct temperature according to the procedure
outlined in SI.
If the fluid level is correct, the technician should remove the transmission pan and inspect
for debris in the fluid and on the magnets.
If the technician finds excessive debris on the magnets, in the fluid, or signs of
overheating, the transmission should be torn down and inspected to identify the cause.
⇒ During tear down and inspection, clutch pack clearance should be measured
and adjusted according to SI specifications. If needed, inspect the steels for
excessive and uneven wear and replace as needed.
Concerns related to a harsh or firm garage shift; the transmission endplay should be
inspected and brought down as close to the tight end of the range, generally between
0.008”-0.012” should be acceptable.
If there are signs of overheating, the technician should verify the TBV valve operation
using a laser thermometer to measure inlet and outlet temperatures of the cooler by
measuring the lines at different locations.
If no debris is found, the transmission valve body should be replaced.
Bulletin No.: 22-NA-246
December, 2022
Page 5
Bulletin 16-NA-019 should be followed to perform the driving learn of the clutches, prior to
any further diagnostic evaluation being performed.
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
1
Modified
Released December 05, 2022
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.
WE SUPPORT VOLUNTARY
TECHNICIAN
CERTIFICATION
- CUTTING EDGE TECHNOLOGY - Shockproof technology designed to...
- QUIET SMOOTH SHIFTING - V-Twin Transmission oil dampens...
- IMPROVES PERFORMANCE - Transmission fluid that dramatically...
- POPULAR POWESPORTS OIL FOR - UTVs & Side by Sides, ATVs...
- WHY RED LINE - Established in 1979, Red Line Products...
- CUTTING EDGE TECHNOLOGY - Shockproof technology designed to...
- QUIET SMOOTH SHIFTING - V-Twin Transmission oil dampens...
- IMPROVES PERFORMANCE - Transmission fluid that dramatically...
- POPULAR POWESPORTS OIL FOR - UTVs & Side by Sides, ATVs...
- WHY RED LINE - Established in 1979, Red Line Products...
Last update on 2026-06-23 / Affiliate links / Images from Amazon Product Advertising API
If the PDF is very large, it may not load in the preview below.
Some older TSBs had multiple PDFs — visit the NHTSA Website to view all PDFs.
If the TSB PDF does not show, download or view it on the NHTSA Website.
Click on the (+) Plus Sign
Then Click on Associated Document(s)
Search NHTSA Database for Recalls
Search NHTSA Database for Vehicle Investigations
View Latest Vehicle Investigations
Search NHTSA Database for Vehicle Complaints
View Latest Vehicle Complaints
TSB/Document ID: 22-NA-246
Replacement Service Bulletin Number:
MFR Communication Date: 2022-12-05
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 |
- Stay Updated with Lifetime Access: This obd2 scanner includes lifetime free software updates for all app service functions. With a single payment, enjoy full access to diagnostics, reset tools, and maintenance features — zero subscription fees. A budget-friendly choice for weekend mechanics, home car owners, and DIYers, supporting vehicles from 1996 onward. Come to us with your VIN to check compatibility.
- Full Bidirectional Control/Active Tests & Stable Wireless Connectivity: This car code reader features full bidirectional control, allowing you to send commands to the vehicle's ECU for active tests on components such as fuel pumps, injectors, A/C clutches, windows, sunroofs, and more. This car scanner diagnostic tool helps DIYers quickly diagnose and test vehicle parts, cutting down troubleshooting and repair time. With BT 4.0 wireless connectivity, you can enjoy cable-free diagnostics up to 33 feet. Stand in your garage and test windows, wipers, or even engine components—all without needing to move around your car.
- Portable Car Scanner with 26 Special Functions: Scheduled vehicle maintenance with the A30M car diagnostic scanner can keep your vehicle in peak condition and save you big on dealership trips. The XTOOL A30M obd2 scanner diagnostic tool features essential reset and relearn functions, such as Oil Reset, EPB Reset (Electronic Parking Brake Release), SAS, ABS Brake Bleeding, Throttle Body Relearn, Injector Coding, Crank Sensor Relearn, Headlight Adjustment, and Tire Size Reset. Note: Service functions may vary by vehicle model – check compatibility beforehand!
- Wide Compatibility CAN FD & FCA
Autoauth: This obd2 scanner diagnostic tool is compatible with over 85+ car brands from the U.S., Europe, and Asia, providing extensive coverage through a BT connection with your smartphone or iPad. Now upgraded to support the latest protocols, it includes FCA AutoAuth access for Chrysler, Jeep, Dodge, and Fiat (2018+), and supports CAN FD for GM (2020+) models, giving you greater access to newer vehicles and systems. Note: The FCA AutoAuth account is not included with the device. Users must register and pay separately through the official FCA AutoAuth website to access diagnostic functions for vehicles that require it. - Up to 8 Live Data Streams Graphing – Real-Time Graphing for Deeper Insight: This car scanner supports up to 8 live data streams simultaneously with intuitive, real-time graphing. Gain comprehensive insights into your vehicle’s performance, making it easier to spot issues, detect trends, and make informed diagnostic decisions with confidence.
- Comprehensive OBD2 Scanner with 16 Resets: The XTOOL D5S car code reader and vehicle reset tool provides an advanced diagnostic solution with 16 commonly needed reset functions, including Electronic Parking Brake Reset (EPB Reset), SAS, BMS Reset (Battery Test), Throttle Body Relearn, TPMS Reset, ABS Bleeding, Injector Coding, Gearbox Match, Suspension Adjustment, Headlight, Window Initialization, Crank Sensor Relearn and more. Equipped with CAN FD Protocol and FAC AutoAuth, the D5S obd2 scanner diagnostic tool ensures compatibility with a broad range of modern vehicles, allowing users to address common maintenance needs quickly. NOTE: Please Check the Compatibility before ordering.
- 4 Main System Car Scanner & Full OBD2 Diagnostics: The XTOOL D5S car code reader is ideal for home mechanics, DIYers, and professionals, providing access to Transmission/Engine/ABS/SRS systems to read DTCs, Live data can be displayed in text or up to 4 PID data graphs, along with full OBD2 diagnostics to check the engine light on, other obd2 issues and routine maintenance. This car diagnostic scanner ensures you can keep your vehicles in top condition, avoiding costly repairs or unexpected breakdowns. NOTE: Some vehicles display three systems after connection because the transmission and engine of some vehicles are integrated into one.
- Check Engine Code Reader & Real-Time Engine Monitoring: Whether you're a car owner, a DIYer, or run a repair shop, the XTOOL D5S obd2 scanner diagnostic tool makes engine diagnostics fast and frustration-free, reading and explaining trouble codes in seconds—no confusion. Check live data like fuel trim, 02 sensor voltage, RPM, and coolant temp to pinpoint mis~fires, rough idle, or sensor issues. After repairs, simply use the D5S check engine code reader and reset tool to turn off the check engine light and confirm the problem’s fixed—saving time, money, and unnecessary shop visits. - Note: If the check engine light comes back on, it indicates the original problem still exists.
- Portable Car Scanner for ABS and SRS: XTOOL D5S gives you peace of mind when ABS or airbag warning lights come on. It reads and clears ABS codes to help you fix brake sensor, traction control, or wheel speed issues, and supports ABS bleeding after repairs like caliper or master cylinder replacement. For airbag systems, it scans and clears SRS codes related to airbags, seatbelt tensioners, and crash sensors. Whether you're doing repairs at home or running a small shop, the D5S is a cost-effective solution for safety diagnostics. Note: If a fault code returns after clearing, it usually means the issue hasn’t been fully resolved. Please check the compatibility before ordering.
- Transmission Warning Light ON? Here’s the Transmission Diagnostic and Reset Tool You Need: The XTOOL D5S is more than just a basic car scanner—it’s an easy-to-use transmission diagnostic tool. From rough shifts to slipping gears, the D5S lets you read and clear transmission trouble codes, monitor real-time TCM data, and perform transmission resets after fluid changes or repairs. Whether you’re a hands-on car owner or a pro running a busy shop, this OBD2 scanner with transmission functions helps you catch problems early—saving you time, money, and future headaches.. Note: Clearing fault codes is equivalent to a reset on some vehicles, but not all. For help, contact XTOOL Tech Support.
- Save $500+/Year with Pro-Level Diagnostics -No Subscriptions: The Portable XTOOL Anyscan A30D OBD2 scanner diagnostic tool includes free lifetime software updates for all app service functions, without extra cost. With a single payment, enjoy full access to diagnostics, relearn scan tools, and maintenance features. A cost-effective, smart choice for car owners and DIY enthusiasts, compatible with vehicles from 1996 onward. Please provide the car VIN and the special functions you need in advance so that we can confirm compatibility
- Bi-Directional Control for Faster Troubleshooting: Unlike a basic code reader, the A30D bi directional scan tool sends commands directly to your vehicle’s ECU to actively test components like fuel pump, valves, wipers, windows, doors, sunroof, and headlamps right from your smartphone. See component responses in real time without disassembly—perfect for brake jobs, electrical issues, and hard-to-find problems. This bidirectional obd2 scanner helps pinpoint faults faster, reduce guesswork, and avoid replacing good parts. An efficient, easy-to-use car scanner diagnostic tool built for DIYers, home garage users, and small-shop technicians who want real two-way scanner, not just codes
- 19 Reset Functions for Routine Maintenance: The A30D car diagnostic scanner provides 19 relearn functions without extra charges, including EPB Reset for parking brake replacement, TPMS Reset after tire changes, ABS Auto Bleeding, Oil Reset, SAS Reset, BMS Reset, Throttle Relearn, Injector C0ding, Gear Learning, Crank/Crankshaft/Cam/Ckp Sensor Relearn Tool, Transmission Match, Seat Calibration, Airbag Repair and more. This XTOOL A30D automotive scanner diagnostic tool supports preventive care, helping extend vehicle life and reduce costly shop visits. Functions vary by vehicle make and year—plz confirm compatibility before purchase
- Stable BT Connection & All-System & 8 Pids Live Data: The A30D wireless OBD2 scanner delivers a fast and stable wireless connection up to 33 feet, letting you move freely around the vehicle without tangled cables. Pair with with Android 9.0+ and iOS 10.0+ devices to turn your phone into a mobile auto scanner—perfect for home garages, driveways, or on-the-spot repairs. This full system scanner for cars provides real-time access to all major modules, including Engine, Gearbox, ABS, SRS, AC and more. with clear graphs, meters, and up to 8 PIDs displayed at once. This car code reader makes system monitoring visual, simple, easy to understand, and offering data logging for playback and deeper
- Wide Compatibility with CAN-FD & FCA Support: The A30D car computer diagnostic reader works with most 1996 and newer vehicles with a standard OBD2 port, including for Ford, for GM, for Toyota, for Honda, for Nissan,for Hyundai etc, with ongoing updates covering more car models and functions later. It also supports newer communication protocols like CAN-FD and FCA AutoAuth (Personal AutoAuth account and active subscription required, not included with the device!for Chrysler, for Dodge, for Jeep, for Fiat models). It is a future-ready automotive scanner diagnostic tool for households with multiple vehicles or part-time techs. Coverage vary by cars, plz check the compatibility first
Last update on 2026-06-23 / Affiliate links / Images from Amazon Product Advertising API
This product presentation was made with AAWP plugin.