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
- NEW units are manufactured under the guidelines of ISO Quality Standards to ensure consistent quality
- All components are 100% NEW to provide improved performance
- Engineering enhancements to internal components provide the latest, most efficient unit for your vehicle
- Key components are greased to ensure long term reliability in harsh conditions
- All dimensions, key mounting surfaces, and contact points are gauged and measured to ensure proper fit
- Newly manufactured as an exact replacement for your GM vehicle's original starter
- Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
- GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
- GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
- GM regularly updates production and service part designs to integrate new materials and technologies
- [Vehicle Fitment]: Compatible with Buick Rainier 2004-2007; Compatible with Cadillac Escalade 2003-2005; Compatible with Chevrolet Avalanche 2007-2008, Avalanche 1500 2003-2006, Express 1500 2004-2007, Express 2500 2004-2007, Express 3500 2005-2007, Silverado 1500 2003-2008, Silverado 1500 Classic 2007, Suburban 1500 2003-2008, Tahoe 2003-2008, Trailblazer 2006-2008, Trailblazer EXT 2004-2006
- [Vehicle Fitment]: Compatible with GMC Envoy 2005-2009, Envoy XL 2004-2006, Envoy XUV 2004-2005, Savana 1500 2004-2007, Savana 2500 3500 2004-2007, Sierra 1500 2003-2008, Sierra 1500 Classic 2007, Yukon 2003-2008, Yukon XL 1500 2003-2008; Compatible with Isuzu Ascender 2004-2006; Compatible with Saab 9-7x 2005-2008
- [Reference Number]: 6494N, 6494, 12568051, 12578050, 12592294, 12604477, 89-01-7440, 89-01-7631, 89017440, 89017631, 8000016, 8000045, 8000150
- [Specifications]: With 1PC Starter Motor --- ① Volts: 12V; ② Power Rating: 1.1KW; 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.
- ACDelco GM Original Equipment Starter
- Part Number: 12740952
- 100 percent 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
- 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
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