21NA276
Service Bulletin Details
Public Details for: 21NA276
This service bulletin provides a procedure to correct a customer concern of starter not cranking engine, grinding noise when starting?.
Models from 2021
| 2021 BUICK ENVISION |
| 2021 CHEVROLET BLAZER |
| 2021 CHEVROLET EQUINOX |
| 2021 GMC ACADIA |
| 2021 GMC TERRAIN |
Models from 2020
| 2020 BUICK ENVISION |
| 2020 CHEVROLET BLAZER |
| 2020 CHEVROLET EQUINOX |
| 2020 CHEVROLET IMPALA |
| 2020 GMC ACADIA |
| 2020 GMC TERRAIN |
Models from 2019
| 2019 BUICK ENVISION |
| 2019 CHEVROLET BLAZER |
| 2019 CHEVROLET EQUINOX |
| 2019 CHEVROLET IMPALA |
| 2019 GMC ACADIA |
| 2019 GMC TERRAIN |
Bulletin No.: Service Bulletin Date: 21-NA-276 November, 2021 TECHNICAL Subject: Starter Not Cranking Engine, Grinding Noise When Starting This bulletin replaces PIP5708B. Please discard PIP5708B. Model Year: VIN: Brand: Model: Buick Envision 2019 Blazer 2019 Chevrolet Equinox 2019 Impala 2019 2020 2019 2021 2018 2020 GMC Holden Acadia Terrain Equinox from to from to Engine: Transmission: 2.5L (LCV) 2021 2.5L (LCV) 2.0L (LTG) — — 2.5L (LCV) — 2.5L (LCV) 2.0L (LTG) 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. Replace the flex plate and inspect the starter motor drive pinion teeth for noticeable damage. Correction ⇒ 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: Copyright 2021 General Motors LLC. All Rights Reserved. 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. Version 1 Modified Released November 24, 2021 Labor Operation Description Labor Time 4066950 Automatic Transmission Flex Plate Replacement Use Published Labor Operation Time 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