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NHTSA ID Number: 10205595
Manufacturer Communication Number: 21NA279
Summary
This service bulletin provides a procedure to replace the starter if found the cause of the rattle noise.
25 Affected Products
Vehicles
| MAKE | MODEL | YEAR |
BUICK | ENVISION | 2021-2022 |
| CADILLAC | CT4 | 2020-2022 |
| CADILLAC | CT5 | 2020-2022 |
| CADILLAC | XT4 | 2019-2022 |
| CADILLAC | XT5 | 2020-2022 |
| CADILLAC | XT6 | 2020-2022 |
| CHEVROLET | BLAZER | 2019-2022 |
| GMC | ACADIA | 2020-2022 |
Condition
Some customers may comment that a rattle type noise can be heard coming from the engine/transmission area or from the front of vehicle when the engine is running or the vehicle is in motion and making turns.
Cause
The cause of this condition may be that the starter pinion gear may be loose and making contact with the flywheel.
Correction
Note: To duplicate this noise, drive the vehicle at low speed and make right hand turns. The rattle develops from the starter drive gear sliding down the starter motor shaft and contacting the ring gear.
Inspect and, if necessary, replace the starter.
⇒ If you are able to duplicate the noise, remove the starter motor per the SI procedure and inspect the drive pinion gear. Hold the starter level and tip the nose down. If the gear slides down the motor shaft, replace the starter.
Service Procedure
Refer to Starter Replacement in SI.
SEOCONTENT-START
Service Bulletin Bulletin No.: 21-NA-279
Date: December, 2021
TECHNICAL
Subject: Rattle Type Noise Heard Coming from Engine/Transmission Area or from Front of
Vehicle When Engine is Running or Vehicle is in Motion and Making Turns
Brand: Model:
Model Year: VIN:
Engine: Transmission:
from to from to
Buick Envision 2021
2022 — —
2.0L
Turbo (LSY) —
Cadillac
CT4 2020
CT5 2020
XT4 2019
XT5 2020
XT6 2020
Chevrolet Blazer 2019
GMC Acadia 2020
Involved Region or Country United States, Canada, Europe, Russia, Middle East, Israel, Palestine, Chile, Colombia,
Peru, Japan, Cadillac Korea (South Korea)
Condition
Some customers may comment that a rattle type noise can be heard coming from the
engine/transmission area or from the front of vehicle when the engine is running or the
vehicle is in motion and making turns.
Cause The cause of this condition may be that the starter pinion gear may be loose and making
contact with the flywheel.
Correction
Note: To duplicate this noise, drive the vehicle at low speed and make right hand turns.
The rattle develops from the starter drive gear sliding down the starter motor shaft and
contacting the ring gear.
Inspect and, if necessary, replace the starter.
⇒ If you are able to duplicate the noise, remove the starter motor per the SI
procedure and inspect the drive pinion gear. Hold the starter level and tip the
nose down. If the gear slides down the motor shaft, replace the starter.
Service Procedure
Refer to Starter Replacement in SI.
Parts Information
Use the VIN and refer to the GM Electronic Parts
Catalog (EPC) to determine the proper part to order.
Causal
Part
Description Part
Number
Qty
N/A STARTER, ENG Refer
to EPC
1
Page 2 December, 2021 Bulletin No.: 21-NA-279
Warranty Information
For vehicles repaired under warranty, use:
Labor
Operation
Description Labor Time
4041250
Starter Replacement Use
Published
Labor
Operation
Time
Version 1
Modified Released November 29, 2021
SEOCONTENT-END
1 Associated Document
Manufacturer Communications
Bulletin No.: 21-NA-279
Date: December, 2021
MC-10205595-9999.pdf 504.006KB
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- 100% newly manufactured as an exact replacement for your GM vehicle’s original starter
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![A-Premium High Torque Starter Motor [3HP|12V|2.5KW|9Teeth|OSGR|CW] Fit for GM Race Car, Small Block Chevy (SBC) 327 350 383, Big Block Chevy (BBC) 396 454 502, Replace for # 18493 410-44033](https://m.media-amazon.com/images/I/41A7dmZxFEL.jpg "Rattle Type Noise Heard Coming from Engine/Transmission Area or from Front of Vehicle When Engine is Running or Vehicle is in Motion and Making Turns - 2019-2022 Buick Cadillac Chevrolet GMC 8")
- [Vehicle Fitment]: Compatible with GM Race Car, Such As: Small Block Chevy (SBC) 327 350 383 or Big Block Chevy (BBC) 396 454 502 Engine with 153 or 168 tooth flywheels
- [Reference Number]: 104010, 18493, 22202HI, 41044033, 46835, 572633, 600000, 91251201N, SHI0032
- [Package Contents]: 1x High Torque Starter Motor & & Shim Kit; Packaging Type: Box
- [Specifications]: ① Power Rating: 2.5KW; ② Volts: 12V; ③ Number of Teeth: 9; ④ Rotation: CW (Clockwise); ⑤ Starter Type: OSGR
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- Part Number: 12740952
- 100 percent newly manufactured as an exact replacement for your GM vehicle’s original starter
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- Replacement Part Numbers: 10465606, SDR0272, 9000895, 8000193, 6932, 6788N, 6788, 410-12451, 41012451, 410-12163R, 41012163R, 410-12163, 41012163, 3862308, 3858463, 323-1619, 3231619, 1650426, 1469603
- Condition: New; Unit Type: PMGR; Unit Series: PG260L; Voltage: 12V; kW: 1.6; Rotation: CW; Tooth Count: 11; Mounting Hardware Included: No; Number of Pieces: 1; Country of Origin: CN
- Brand New - Manufactured With New Premium Quality Components - Engineered To Meet Or Exceed OEM Specifications - All Items Tested For Reliability, Durability And Performance
- See Product Description for Additional Specifications
- 100% newly manufactured as an exact replacement for your GM vehicle’s original starter
- Components are tested to meet original specification requirements for remarkable durability
- GM-recommended replacement part for your GM vehicle’s original factory component
- Offering the quality, reliability, and durability of GM OE
- Manufactured to GM OE specifications for fit, form, and function
- Built for performance
- Package Dimensions: 34.0 H x 14.0 L x 18.6 W (centimeters)
- Country of Origin : United States
- Package Weight: 3.899 kilograms
- 100% newly manufactured as an exact replacement for your GM vehicle’s original starter
- Components are tested to meet original specification requirements for remarkable durability
- GM-recommended replacement part for your GM vehicle’s original factory component
- Offering the quality, reliability, and durability of GM OE
- Manufactured to GM OE specifications for fit, form, and function
- [Vehicle Fitment-1]: Compatible with Chevrolet Cavalier 1998-2002 L4 2.2L, Equinox 2005-2005 V6 3.4L, Impala 2000-2005 V6 3.4L, Lumina 1997-2001 V6 3.1L, Malibu 1997-2003 V6 3.1L, Malibu 2004-2005 V6 3.5L, Monte Carlo 1997-1999 V6 3.1L, Monte Carlo 2000-2005 V6 3.4L, S10 1999-2003 L4 2.2L, Uplander 2005-2005 V6 3.5L, Venture 1997-2005 V6 3.4L; Compatible with Buick Century 1997-2005 V6 3.1L, Rendezvous 2002-2005 V6 3.4L, Terraza 2005-2005 V6 3.5L; Compatible with Isuzu Hombre 1999-2000 L4 2.2L
- [Vehicle Fitment-2]: Compatible with GMC Sonoma 1999-2003 L4 2.2L; Compatible with Pontiac Aztek 2001-2005 V6 3.4L, G6 2005-2005 V6 3.5L, Grand Am 1999-2005 V6 3.4L, Grand Prix 1998-2003 V6 3.1L, Montana 1999-2005 V6 3.4L, Montana 2005-2005 V6 3.5L, Sunfire 1998-2002 L4 2.2L, Trans Sport 1997-1999 V6 3.4L; Compatible with Oldsmobile Alero 1999-2004 V6 3.4L, Cutlass 1997-1999 V6 3.1L, Silhouette 1997-2004 V6 3.4L; Compatible with Saturn Relay 2005 V6 3.5L
- [Reference Number]: 10465384, 10465459, 10465519, 10465542, 106481, 1-06481, 106491, 1-06491, 12563764, 12563881, 12570255, 12572136, 12577949, 12579131, 12593764, 1457048, 19136230, 19136240, 3231062, 323-1062, 3231396, 323-1396, 3231429, 323-1429, 3231447, 323-1447, 3231626, 323-1626, 3361921, 336-1921, 3361921A, 336-1921A, 3361931, 336-1931, 41012228, 410-12228, 41012260, 410-12260, 6481, 6491, 6491N, 8000058, 8104654590, 89017714, 9000833, 9000847, 9000859, 9000868, 9000901
- [Specifications]: ① Power Rating: 1.4KW; ② Volts: 12V; ③ Number of Teeth: 9; ④ Rotation: CW (Clockwise)
- [Buy with Confidence]: A-Premium offers a one-year unlimited-mileage guarantee on our meticulously crafted starter motors. We offer a wide variety of automotive accessory categories, ensuring that you can hit the road with peace of mind.
Last update on 2025-06-11 / Affiliate links / Images from Amazon Product Advertising API
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