19419492
88865601 US
19420142 CA
25874797
22816982
11548893
23206807
23206808
11611687
11547142
90121202
84297549
11547918
11610906
11611268
11609598

Terrain M3H AWD
Quantity
1
6
1
1
1
4
1
1
2
2
2
1
3
7
4
1
3

Part Name
TRANSMISSION
TRANSMISSION FLUID
SEAL, TRANS FLUID CLR HOSE FTG (O RING) (AT DIFF CLR)
GASKET, EXH SYS INTER
GASKET
BOLT, FRT LWR CONT ARM FRT (SINGLE USE) (ACDelco #11548893)
SEAL, PWR TRFER U CVR TO INTER DRV SHF
RETAINER, PWR TRFER U PROP
NUT, RR WHL DRV SHF (M24X1.5,50 OD,22THK)
WASHER, RR WHL DRV SHF
RING
SEAL
BOLT, ENG MT ENG SI (M12 X 1.75 X 61) (04.085) (ACDelco #11547918)
BOLT, TRANS MT STRUT BRKT (SINGLE USE) (M12X1.75X56)
BOLT, TRANS MT STRUT BRKT (SINGLE USE) (M12X1.75X90)
BOLT, TRANS MT STRUT (Service Lane Part)
BOLT, TRANS RR MT BRKT (M12X1.75X80.9)

Part No.
24283836
88865601 US
19420142 CA
25874797
22816982
23438041
11548893
23206807
23206808
11611687
11547142
90121202
84297549
11547918
11610906
11611268
11546386
11609598

Terrain M3H FWD
Quantity
1
6
1
1
1
4
2
2
2
1
3
7
4
1

Part Name
TRANSMISSION
TRANSMISSION FLUID
SEAL, TRANS FLUID CLR HOSE FTG (O RING) (AT DIFF CLR)
GASKET, EXH SYS INTER
GASKET
BOLT, FRT LWR CONT ARM FRT (SINGLE USE) (ACDelco #11548893)
NUT, RR WHL DRV SHF (M24X1.5,50 OD,22THK)
WASHER, RR WHL DRV SHF
RING
SEAL
BOLT, ENG MT ENG SI (M12 X 1.75 X 61) (04.085) (ACDelco #11547918)
BOLT, TRANS MT STRUT BRKT (SINGLE USE) (M12X1.75X56)
BOLT, TRANS MT STRUT BRKT (SINGLE USE) (M12X1.75X90)
BOLT, TRANS MT STRUT (Service Lane Part)

Part No.
24283835
88865601 US
19420142 CA
25874797
22816982
23438041
11548893
11611687
11547142
90121202
84297549
11547918
11610906
11611268
11546386
Page 3 of 5

Service Update
N202321840 Transmission Clutch Spring Retaining Ring
3

BOLT, TRANS RR MT BRKT (M12X1.75X80.9)

11609598

Terrain M3U FWD
Quantity
1
6
1
1
1
1
2
2
2
3
7
4
1
3

Part Name
TRANSMISSION
TRANSMISSION FLUID
SEAL, TRANS FLUID CLR HOSE FTG (O RING) (AT DIFF CLR)
GASKET, EXH SYS INTER
GASKET
BOLT, FRT LWR CONT ARM FRT (SINGLE USE) (ACDelco #11548893)
NUT, RR WHL DRV SHF (M24X1.5,50 OD,22THK)
WASHER, RR WHL DRV SHF
RING
BOLT, ENG MT ENG SI (M12 X 1.75 X 61) (04.085) (ACDelco #11547918)
BOLT, TRANS MT STRUT BRKT (SINGLE USE) (M12X1.75X56)
BOLT, TRANS MT STRUT BRKT (SINGLE USE) (M12X1.75X90)
BOLT, TRANS MT STRUT (Service Lane Part)
BOLT, TRANS RR MT BRKT (M12X1.75X80.9)

Part No.
24283827
88865601 US
19420142 CA
25874797
22816982
23438041
11548893
11611687
11547142
90121202
11547918
11610906
11611268
11546386
11609598

Terrain M3U AWD
Quantity
1
6
1
1
1
1
1
1
2
2
2
1
3
7
4
3

Part Name
TRANSMISSION
TRANSMISSION FLUID
SEAL, TRANS FLUID CLR HOSE FTG (O RING) (AT DIFF CLR)
GASKET, EXH SYS INTER
GASKET
BOLT, FRT LWR CONT ARM FRT (SINGLE USE) (ACDelco #11548893)
SEAL, PWR TRFER U CVR TO INTER DRV SHF
RETAINER, PWR TRFER U PROP
NUT, RR WHL DRV SHF (M24X1.5,50 OD,22THK)
WASHER, RR WHL DRV SHF
RING
SEAL
BOLT, ENG MT ENG SI (M12 X 1.75 X 61) (04.085) (ACDelco #11547918)
BOLT, TRANS MT STRUT BRKT (SINGLE USE) (M12X1.75X56)
BOLT, TRANS MT STRUT BRKT (SINGLE USE) (M12X1.75X90)
BOLT, TRANS RR MT BRKT (M12X1.75X80.9)

Part No.
24283828
88865601 US
19420142 CA
25874797
22816982
23438041
11548893
23206807
23206808
11611687
11547142
90121202
84297549
11547918
11610906
11611268
11609598

Parts should only be ordered when inspection determines that it is necessary. If inspection determines procedure is
necessary, use the VIN and the GM Electronic Parts Catalog (EPC) to determine which part to order.
Important: Due to limited initial parts availability, dealers are encouraged not to order these parts for use as
shelf stock.
Reminder: Parts may be removed from Retail Inventory Management (RIM). Dealers should review the affected parts
to confirm RIM managed status. Parts may have quantity limiters in effect.

Page 4 of 5

Service Update
N202321840 Transmission Clutch Spring Retaining Ring
Warranty Information
Labor
Operation
9105544
9105545

Description
Inspect Only – Vehicle Passed Inspection
Replace Transmission (includes inspection)
Blazer M3D FWD, Blazer M3T FWD, Blazer M3V FWD
Blazer M3V AWD
Equinox M3D AWD, Terrain M3U AWD, Terrain M3H AWD
Equinox M3D FWD, Terrain M3U FWD, Terrain M3H FWD

Labor
Time
0.5

Trans.
Type
ZFAT
ZFAT

Net
Item
N/A
N/A

8.0
10.4
8.9
7.7

Service Procedure
Important: This test should be performed with the engine idling and no use of the accelerator pedal (or engine revving).
1.

Start vehicle and warm up for 1 minute.

2.

Apply the parking brake before starting the test.

3.

While applying the brakes AT ALL TIMES, shift the transmission from P (park) to R (reverse), N (neutral) and to D
(drive) waiting 3 seconds between shifts.

4.

Reverse the steps from D (drive), N (neutral), R (reverse) and to P (park) waiting 3 seconds between shifts while
continuing applying the brakes.

5.

Repeat this process 30 times and look for a “shift bump” going into or coming out of D (drive).

6.

If no shift bumps are felt, no further action is required. Verify the vehicle engages in park and does NOT move or roll
with the park brake disengaged.

7.

If shift bumps are felt, replace the transmission. Refer to Transmission Replacement in SI.

Dealer Responsibility
Dealers must take the steps necessary to ensure that the service update has been made to all involved vehicles in dealer
inventory before selling or dealer-trading the vehicle, but no later than February 28, 2022.
All new, used, GM Certified Used, courtesy transportation vehicles, dealer shuttle vehicles, etc. in dealers' possession
and subject to this bulletin must be held and inspected/repaired per the service procedure of this bulletin before customers
take possession of these vehicles. Involved vehicles must be held and not delivered to customers, dealer-traded,
released to auction, used for demonstration, or any other purpose.
All GM Certified Used vehicles currently in the dealers’ inventory within the Certified Pre-Owned Inventory System
(CPOIS) will be de-certified and must be held and remedied per the service procedure in this bulletin. Upon submitting
an accepted/paid warranty transaction in the Global Warranty Management (GWM) system, the vehicle can be re-certified
for sale within the CPOIS system, or once again be used in the CTP program.
Dealer Reports
The Inventory tab of the Open Vehicle Report will contain Service Update Bulletin VINs that apply to this field action.
This information is intended to assist dealers with the PROMPT COMPLETION of these vehicles. The Customer InService tab will not contain Service Update Bulletin VIN data because the intent of a Service Update Bulletin is to not
inconvenience a customer with a special trip for service. Service Update Bulletins are to be completed when the
customer is in for a regularly scheduled visit.

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 tools, equipment, 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 dealer for information on whether your
vehicle may benefit from the information.

We Support
Voluntary Technician
Certification

Page 5 of 5

GLOBAL SAFETY FIELD INVESTIGATIONS
DCS5643
URGENT - DISTRIBUTE IMMEDIATELY
Date:

January 14, 2021

Subject: N202321840 - Service Update
Transmission Clutch Spring Retaining Ring
Models: 2020-2021 Chevrolet Blazer (RPO M3D, M3V, M3T)
2020 Chevrolet Equinox (RPO M3D)
2020-2021 GMC Terrain (RPO M3H/M3U)
Equipped with Automatic Transmission
To:

All General Motors Dealers

General Motors is releasing Service Update N202321840 today. The total
number of U.S. vehicles involved is approximately 282. Please see the
attached bulletin for details.
Global Warranty Management (GWM)
The Required Field Action section on the Investigate Vehicle History (IVH) screen will
be updated January 15, 2021 or sooner. A list of involved vehicles in dealer new
inventory is attached to this message. Please hold all warranty transactions until IVH
has been updated.
END OF MESSAGE
GLOBAL SAFETY FIELD INVESTIGATIONS