# Service bulletin 21NA079

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 10198870
- Published by NHTSA: 2021\-07\-06
- Manufacturer's number: 21NA079
- Manufacturer's date: 2021\-05\-03
- NHTSA component: SEATS

## NHTSA's summary

This technical bulletin provides a procedure to replace the lower seat frame to correct the condition of Pop Noise Heard During Seat Travel and/or Inadequate Seat Rearward Travel due to a supplier installation error.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10198870-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10198870-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Seats

## Vehicles listed

- 2021 CHEVROLET SILVERADO 1500
- 2021 CHEVROLET SILVERADO 2500
- 2021 GMC SIERRA 1500
- 2021 GMC SIERRA 2500

## Recalls for the same vehicles and component

- [2020645](/recalls/tc/2020645.md), 2020-12-23: Seats And Restraints
- [2020624](/recalls/tc/2020624.md), 2020-12-17: Seats And Restraints

## Other bulletins for the same vehicles and component

- [24\-NA\-239](/bulletins/11013269.md), 2025-01-30, Service bulletin: ELECTRICAL SYSTEM; SEATS; STRUCTURE:BODY; STEERING; ENGINE. This informational bulletin provides a guide on how to diagnose and test for vibrations utilizing the PicoScope.
- [PIT6180](/bulletins/11006317.md), 2024-08-13, Service bulletin: SEATS. This Preliminary information communicates assistance in locating the Rear seat belt comfort guides in the parts catalog.
- [06\-00\-89\-029V](/bulletins/11000158.md), 2024-05-16, Service bulletin: SEATS; UNKNOWN OR OTHER. This service bulletin includes information on Interior Cleaning \- Instrument Panel \(IP\), Hard or Plastic Surfaces, Seats, Carpet, Leather, Vinyl, Fabric Cleaner, Stain Remover, Restorer \- Product Availability.
- [21NA079](/bulletins/10199261.md), 2021-07-19, Service bulletin: SEATS; STRUCTURE. This technical bulletin provides a procedure to replace the lower seat frame to correct the condition of Pop Noise Heard During Seat Travel and/or Inadequate Seat Rearward Travel due to a supplier installation error.

JSON: [/v1/bulletins/10198870](/v1/bulletins/10198870)

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