# Service bulletin 19NA216

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: 10171898
- Published by NHTSA: 2020\-03\-02
- Manufacturer's number: 19NA216
- Manufacturer's date: 2020\-01\-08
- NHTSA component: POWER TRAIN:TRANSFER CASE \(4\-WHEEL DRIVE\); EQUIPMENT

## NHTSA's summary

This technical bulletin provides the tech with a procedure to check the t\-case for loose fasteners and to re\-torque if the cause of the concern.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10171898-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10171898-9999.pdf)

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

## Components

Equipment and accessories, Transmission and driveline, Transfer case

## Vehicles listed

- 2020 CHEVROLET SILVERADO 2500
- 2020 CHEVROLET SILVERADO 3500
- 2020 GMC SIERRA 2500
- 2020 GMC SIERRA 3500

## Other bulletins for the same vehicles and component

- [PIP5825](/bulletins/10234238.md), 2023-04-17, Service bulletin: POWER TRAIN:TRANSFER CASE \(4\-WHEEL DRIVE\). This Preliminary information communicates A vehicle may come in with a internal transfer case concern. Internal fault , Dealers need to disassemble to the point of failure and then do a cost comparison to determan repair VS. replacement.
- [PIP5894](/bulletins/10230699.md), 2023-01-30, Service bulletin: POWER TRAIN:TRANSFER CASE \(4\-WHEEL DRIVE\). This Preliminary information communicates proper alignment of the transfer case actuator during repair or actuator replacement
- [PIP5810A](/bulletins/10224291.md), 2022-10-17, Service bulletin: POWER TRAIN:TRANSFER CASE \(4\-WHEEL DRIVE\). This Preliminary information communicates that the tool for the HD transfer cases to install the input seal during a repair is incorrect and a new tool is in development.
- [19NA136](/bulletins/10186069.md), 2021-02-01, Service bulletin: PARKING BRAKE; EQUIPMENT; POWER TRAIN:TRANSFER CASE \(4\-WHEEL DRIVE\). This service bulletin provides a diagnostic procedure to aid in correcting a customer concern of a Howling, Whining/Whirring Noise, Shudder/Vibration and/or Grinding Noise While in 4HI, 4HI Auto and/or During Parking Lot Maneuvers in Auto Mode.
- [PIE0560A](/bulletins/10175858.md), 2020-06-01, Service bulletin: EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; POWER TRAIN:TRANSFER CASE \(4\-WHEEL DRIVE\). This engineering information \(EI\) is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to a Service 4WD message being visible on the driver information center \(DIC\).

JSON: [/v1/bulletins/10171898](/v1/bulletins/10171898)

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