# Service bulletin 21NA275

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: 10214216
- Published by NHTSA: 2022\-06\-21
- Manufacturer's number: 21NA275
- Manufacturer's date: 2022\-01\-25
- NHTSA component: WHEELS; SERVICE BRAKES

## NHTSA's summary

This service bulletin provides repair information to correct customer concerns of Rear Wheel Lock Up, ABS Event, Loud Bang and a Flashing ?D? on Driver Information Center \(DIC\) when Lightly or Moderately Accelerating Forcing an 8\-7 or 8\-6 Downshift.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2022/MC-10214216-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2022/MC-10214216-9999.pdf)

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

## Components

Brakes, Wheels

## Vehicles listed

- 2020 to 2021 CADILLAC CT4
- 2020 to 2021 CADILLAC CT5
- 2019 to 2020 CADILLAC CT6
- 2020 CADILLAC ESCALADE
- 2020 to 2021 CADILLAC ESCALADE ESV
- 2021 CADILLAC ESCALADE NA
- 2020 to 2021 CHEVROLET SILVERADO 1500
- 2020 to 2021 CHEVROLET SILVERADO 2500
- 2021 CHEVROLET SUBURBAN
- 2021 CHEVROLET TAHOE
- 2020 to 2021 GMC SIERRA 1500
- 2020 to 2021 GMC SIERRA 2500
- 2020 GMC SIERRA 3500
- 2021 GMC YUKON
- 2021 GMC YUKON XL

## Recalls for the same vehicles and component

- [25V768000](/recalls/nhtsa/25V768000.md), 2025-11-06: SERVICE BRAKES, HYDRAULIC:POWER ASSIST
- [25V390000](/recalls/nhtsa/25V390000.md), 2025-06-12: SERVICE BRAKES, HYDRAULIC:BRAKE FLUID LOW WARNING:SWITCH/SENSOR/FLOAT
- [2021602](/recalls/tc/2021602.md), 2021-09-29: Brakes
- [21V758000](/recalls/nhtsa/21V758000.md), 2021-09-29: SERVICE BRAKES, HYDRAULIC:POWER ASSIST:ELECTRIC:CONTROL MODULE
- [21V579000](/recalls/nhtsa/21V579000.md), 2021-07-29: SERVICE BRAKES, HYDRAULIC:POWER ASSIST:ELECTRIC:CONTROL MODULE:SOFTWARE
- [2020452](/recalls/tc/2020452.md), 2020-09-24: Brakes
- [20V588000](/recalls/nhtsa/20V588000.md), 2020-09-24: SERVICE BRAKES
- [2020079](/recalls/tc/2020079.md), 2020-02-27: Brakes
- [20V116000](/recalls/nhtsa/20V116000.md), 2020-02-27: SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:CALIPER
- [2019630](/recalls/tc/2019630.md), 2019-12-12: Brakes

## Other bulletins for the same vehicles and component

- [25\-NA\-156](/bulletins/11026104.md), 2025-12-04, Service bulletin: WHEELS. This service bulletin provides information on Tire Sidewall Irregularities.
- [23\-NA\-201](/bulletins/11024378.md), 2025-10-21, Service bulletin: SERVICE BRAKES; ELECTRICAL SYSTEM; STEERING. This service bulletin advises the technician of a possible loose ground that may be causing customer concerns of Loss of Steering Assist and/or Loss of Brake Assist and Malfunction Indicator Lamp \(MIL\) Illuminated.
- [22\-NA\-183](/bulletins/11017449.md), 2025-05-01, Service bulletin: WHEELS. This service bulletin advises the technician of a different tire/rim option that can be used to correct a customer concern of poor ride quality at highway speeds.
- [25\-NA\-065](/bulletins/11017173.md), 2025-04-24, Service bulletin: STEERING; SERVICE BRAKES; FUEL/PROPULSION SYSTEM. This informational bulletin instructs the tech when fuel/fluid is needed to be tested and where it can be sent for analysis.
- [08\-03\-10\-006I](/bulletins/11017016.md), 2025-04-15, Service bulletin: WHEELS. This service bulletin provides a procedure on how to clean and resurface aluminum wheel bead seats for vehicles that have the condition of Tire Slowly Goes Flat, Tire Air Loss, Low Tire Pressure Warning Light Illuminated, Aluminum Wheel Bead Seat Corrosion.
- [05\-03\-07\-009L](/bulletins/11015409.md), 2025-03-08, Service bulletin: SUSPENSION; WHEELS. This service bulletin provides information on Wheel Alignment Specifications, Requirements and Recommendations for GM Vehicles.
- [21\-NA\-043](/bulletins/11014230.md), 2025-02-12, Service bulletin: VISIBILITY/WIPER; SERVICE BRAKES; ENGINE; ELECTRICAL SYSTEM; WHEELS. This bulletin advises the dealers to maintain the vehicle stock on hand by doing a full inspection on the vehicles before being sold \(prepping\) to the customer.
- [25\-NA\-019](/bulletins/11014138.md), 2025-02-11, Service bulletin: WHEELS; VEHICLE SPEED CONTROL; AIR BAGS; ELECTRICAL SYSTEM; SERVICE BRAKES. This bulletin advises the tech to check other areas that may need repair before replacing the wheel speed sensor.
- [22\-NA\-172](/bulletins/11013639.md), 2025-02-05, Service bulletin: WHEELS; ELECTRICAL SYSTEM. This technical bulletin provides repair information to correct a customer concern of Trailer Tire Pressure Only Reading Up To 100 PSI, New Parts To Increase To 147 PSI.
- [21\-NA\-155](/bulletins/11013242.md), 2025-01-30, Service bulletin: SERVICE BRAKES; ELECTRICAL SYSTEM. This informational bulletin advises the technician to check for faults that may be caused by the trailer otherwise found by a possible faulty trailer connector.

JSON: [/v1/bulletins/10214216](/v1/bulletins/10214216)

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