# Service bulletin 19NA136

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: 10186069
- Published by NHTSA: 2021\-02\-01
- Manufacturer's number: 19NA136
- Manufacturer's date: 2020\-12\-01
- NHTSA component: PARKING BRAKE; EQUIPMENT; POWER TRAIN:TRANSFER CASE \(4\-WHEEL DRIVE\)

## NHTSA's summary

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.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10186069-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10186069-9999.pdf)

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

## Components

Brakes, Equipment and accessories, Transmission and driveline, Parking brake, Transfer case

## Vehicles listed

- 2015 to 2019 CADILLAC ESCALADE
- 2015 to 2016 CADILLAC ESCALADE ESV
- 2017 to 2019 CADILLAC ESCALADE ESV
- 2015 to 2018 CHEVROLET COLORADO
- 2020 to 2021 CHEVROLET COLORADO
- 2014 CHEVROLET SILVERADO 1500
- 2017 to 2021 CHEVROLET SILVERADO 1500
- 2014 to 2021 CHEVROLET SILVERADO 2500
- 2019 CHEVROLET SILVERADO 4500
- 2015 to 2019 CHEVROLET SUBURBAN
- 2015 to 2019 CHEVROLET TAHOE
- 2015 to 2021 GMC CANYON
- 2014 GMC SIERRA 1500
- 2020 to 2021 GMC SIERRA 1500
- 2014 to 2021 GMC SIERRA 2500
- 2015 to 2019 GMC SIERRA DENALI
- 2015 to 2019 GMC YUKON

## Recalls for the same vehicles and component

- [26V289000](/recalls/nhtsa/26V289000.md), 2026-05-07: POWER TRAIN:TRANSFER CASE \(4\-WHEEL DRIVE\)
- [14V374000](/recalls/nhtsa/14V374000.md), 2014-06-27: POWER TRAIN:TRANSFER CASE \(4\-WHEEL DRIVE\)

## Other bulletins for the same vehicles and component

- [14192A](/bulletins/10248736.md), 2024-01-16, Service bulletin: POWER TRAIN:TRANSFER CASE \(4\-WHEEL DRIVE\). Unwanted Transfer Case Shift to Neutral
- [14192](/bulletins/10248735.md), 2024-01-16, Service bulletin: POWER TRAIN:TRANSFER CASE \(4\-WHEEL DRIVE\). Unwanted Transfer Case Shift to Neutral
- [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.
- [18367](/bulletins/10212579.md), 2022-05-31, Service bulletin: PARKING BRAKE; EQUIPMENT; AIR BAGS; POWER TRAIN:AUTOMATIC TRANSMISSION:INTERNAL:SHAFT:INPUT; POWER TRAIN. Customer Satisfaction. Certain vehicles, equipped with the 10\-speed automatic transmission \(RPO MF6\), may have a condition in which the transmission manual shaft pin was not seated properly. If the shaft pin were to migrate out of position, the driver may find they cannot shift the vehicle into any gear other than the last one selected. The customer may be unable to return the vehicle back to park, in which case they would be required to engage the parking brake to ensure the vehicle does not roll from its intended position. Dealers will replace the transmission manual shaft pin. Private Message sent to select dealers.
- [PIT5662G](/bulletins/10210345.md), 2022-04-18, Service bulletin: PARKING BRAKE. This Preliminary information communicates information to diagnose DTC C056D or C056E.
- [20\-NA\-207](/bulletins/10209097.md), 2022-03-16, Service bulletin: PARKING BRAKE:ELECTRICAL:CONTROL MODULE; ELECTRICAL SYSTEM; POWER TRAIN. This service bulletin informs the technician to inspect for a possible electrical concern at the ECM X2 electrical connector to correct a customer concern of Malfunction Indicator Lamp \(MIL\) Illuminated \- DTC P0333 Set.
- [PIT5662F](/bulletins/10201321.md), 2021-09-13, Service bulletin: ELECTRICAL SYSTEM:ADAS:PARKING ASSIST:WARNING; PARKING BRAKE. This Preliminary information communicates information to diagnose DTC C056D or C056E.
- [PIE0349A](/bulletins/10201135.md), 2021-09-07, Service bulletin: POWER TRAIN:TRANSFER CASE \(4\-WHEEL DRIVE\); ELECTRICAL SYSTEM. Engineering Information \- Service 4WD Messange Displayed and DTC C0398 \- Equipped with Switch activated transfer case \(RPO NQH\)

JSON: [/v1/bulletins/10186069](/v1/bulletins/10186069)

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