NHTSA ID Number: 10205593
Manufacturer Communication Number: 21NA276
Summary
This service bulletin provides a procedure to correct a customer concern of Starter Not Cranking Engine, Grinding Noise When Starting?.
17 Affected Products
Vehicles
| MAKE | MODEL | YEAR |
| BUICK | ENVISION | 2019-2021 |
| CHEVROLET | BLAZER | 2019-2021 |
| CHEVROLET | EQUINOX | 2019-2021 |
| CHEVROLET | IMPALA | 2019-2020 |
| GMC | ACADIA | 2019-2021 |
| GMC | TERRAIN | 2019-2021 |
Condition
Some customers may comment on one or more of the following conditions:
• Starter spins but it is not cranking over the engine
• A grinding noise when starting the engine
Cause
This condition may be caused by broken and/or damaged teeth on the flex plate.
Correction
Replace the flex plate and inspect the starter motor drive pinion teeth for noticeable damage.
⇒ Remove any broken flex plate teeth or metal debris that may be found on the back of the engine assembly and in the transmission bell housing area.
⇒ If the starter pinion drive teeth or housing only have very small imperfections/ pitting, Do Not replace the starter motor assembly, reuse/reinstall it.
Refer to the pictures below to determine if the starter assembly can be reused/reinstalled.
Examples of starters that can be reused/reinstalled:
If the starter pinion drive teeth or housing have pieces/chunks missing, replace the starter motor assembly.
Examples below of starters not to reuse/reinstall:
SEOCONTENT-START
Service Bulletin Bulletin No.: 21-NA-276
Date: November, 2021
TECHNICAL
Subject: Starter Not Cranking Engine, Grinding Noise When Starting
This bulletin replaces PIP5708B. Please discard PIP5708B.
Brand: Model:
Model Year: VIN:
Engine: Transmission:
from to from to
Buick Envision 2019
2021
— —
2.5L (LCV)
—
Chevrolet
Blazer 2019 2.5L (LCV)
Equinox 2019 2.0L (LTG)
Impala 2019 2020 2.5L (LCV)
GMC
Acadia
2019 2021
2.5L (LCV)
Terrain
2.0L (LTG)
Holden Equinox 2018 2020
Involved Region or Country North America, Australia/New Zealand
Condition
Some customers may comment on one or more of the following conditions:
• Starter spins but it is not cranking over the engine
• A grinding noise when starting the engine
Cause This condition may be caused by broken and/or damaged teeth on the flex plate.
Correction
Replace the flex plate and inspect the starter motor drive pinion teeth for noticeable
damage.
⇒ Remove any broken flex plate teeth or metal debris that may be found on the
back of the engine assembly and in the transmission bell housing area.
⇒ If the starter pinion drive teeth or housing only have very small imperfections/
pitting, Do Not replace the starter motor assembly, reuse/reinstall it.
Refer to the pictures below to determine if the starter assembly can be reused/reinstalled.
Examples of starters that can be reused/reinstalled:
Page 2 November, 2021 Bulletin No.: 21-NA-276
5521948
5521949
If the starter pinion drive teeth or housing have pieces/chunks missing, replace the starter
motor assembly.
Examples below of starters not to reuse/reinstall:
Bulletin No.: 21-NA-276 November, 2021 Page 3
5521950
5521953
Warranty Information
For vehicles repaired under the Powertrain coverage,
use the following labor operation. Reference the
Applicable Warranties section of Investigate Vehicle
History (IVH) for coverage information.
Labor
Operation Description Labor Time
4066950 Automatic Transmission
Flex Plate Replacement
Use
Published
Labor
Operation
Time
Version 1
Modified Released November 24, 2021
SEOCONTENT-END
1 Associated Document
Manufacturer Communications
Bulletin No.: 21-NA-276
Date: November, 2021
MC-10205593-9999.pdf 132.349KB
NHTSA ID Number: 10201262
Manufacturer Communication Number: PIP5708B
Summary
This Preliminary information communicates to the technician the vehicle concern of starter flex plate having broken teeth. This can create a noise during starting or may even have the starter spin but not crank over the engine. The document directs the technician to replace the flex plate and inspect the starter pinion drive teeth and replace starter assembly as needed.
1 Associated Document
Manufacturer Communications
Bulletin No.: PIP5708B
Published date: 07/28/2021
MC-10201262-9999.pdf 887.786KB
NHTSA ID Number: 10172323
Manufacturer Communication Number: PIP5708A
Summary
This Preliminary information communicates to the technician the vehicle concern of starter flex plate having broken teeth. This can create a noise during starting or may even have the starter spin but not crank over the engine. The document directs the technician to replace the flex plate and inspect the starter pinion drive teeth and replace starter assembly as needed.
1 Associated Document
Manufacturer Communications
Bulletin No.: PIP5708A
Published date: 02/18/2020
MC-10172323-9999.pdf 887.613KB
NHTSA ID Number: 10171319
Manufacturer Communication Number: PIP5708
Summary
This Preliminary information communicates to the technician the vehicle concern of starter flex plate having broken teeth. The can create a noise during starting or may even have the starter spin but not crank over the engine. The document directs the technician to replace the flex plate and the starter assembly.
1 Associated Document
Manufacturer Communications
Bulletin No.: PIP5708
Published date: 01/31/2020
- 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
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- International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions
- [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.
- 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
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