# Service bulletin 21\-NA\-166

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: 11019325
- Published by NHTSA: 2025\-06\-06
- Manufacturer's number: 21\-NA\-166
- Manufacturer's date: 2025\-04\-15
- NHTSA component: EXTERIOR LIGHTING; STEERING

## NHTSA's summary

This informational bulletin provides information on the turn signal stalk not cancelling and/or mis cancelling.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11019325-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11019325-9999.pdf)

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

## Components

Lighting, Steering

## Vehicles listed

- 2021 to 2025 CADILLAC ESCALADE
- 2021 to 2025 CADILLAC ESCALADE ESV
- 2020 to 2025 CHEVROLET SILVERADO 1500
- 2020 to 2025 CHEVROLET SILVERADO 2500
- 2020 to 2025 CHEVROLET SILVERADO 3500
- 2021 to 2024 CHEVROLET SUBURBAN
- 2021 to 2025 CHEVROLET SUBURBAN 1500
- 2021 to 2025 CHEVROLET TAHOE
- 2020 to 2025 GMC SIERRA 1500
- 2020 to 2025 GMC SIERRA 2500
- 2020 to 2025 GMC SIERRA 3500
- 2021 to 2025 GMC YUKON
- 2021 to 2025 GMC YUKON XL
- 2023 GMC YUKON XL 1500

## Recalls for the same vehicles and component

- [24V755000](/recalls/nhtsa/24V755000.md), 2024-10-10: EXTERIOR LIGHTING:LIGHTING CONTROL MODULE
- [2024519](/recalls/tc/2024519.md), 2024-09-12: Lights And Instruments
- [2024060](/recalls/tc/2024060.md), 2024-02-01: Lights And Instruments
- [2023472](/recalls/tc/2023472.md), 2023-08-24: Lights And Instruments
- [23V549000](/recalls/nhtsa/23V549000.md), 2023-08-03: STEERING
- [2022700](/recalls/tc/2022700.md), 2022-12-08: Lights And Instruments
- [22V903000](/recalls/nhtsa/22V903000.md), 2022-12-08: EXTERIOR LIGHTING:LIGHTING CONTROL MODULE:SOFTWARE
- [2022634](/recalls/tc/2022634.md), 2022-11-03: Lights And Instruments
- [22V827000](/recalls/nhtsa/22V827000.md), 2022-11-03: EXTERIOR LIGHTING:LIGHTING CONTROL MODULE:SOFTWARE
- [2022348](/recalls/tc/2022348.md), 2022-06-30: Lights And Instruments

## Other bulletins for the same vehicles and component

- [07\-08\-42\-006U](/bulletins/11026022.md), 2025-12-03, Service bulletin: EXTERIOR LIGHTING. This service bulletin provides technicians with information on available BCM calibrations to restore bulb outage detection on vehicles produced by a second stage manufacturer \(Upfitter\), and/or turn signals flash fast after factory box removed.
- [N252528020](/bulletins/11025604.md), 2025-11-18, Service campaign: STEERING. Certain vehicles may have a condition in which the Upper Intermediate Steering Shaft Bolt is below torque specification. Dealers will torque the Upper Intermediate Steering Shaft Bolt to specification.
- [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.
- [25\-NA\-116](/bulletins/11022874.md), 2025-09-06, Service bulletin: STEERING; ELECTRICAL SYSTEM. This service bulletin provides information and the condition correction on the "Service Steering Column Lock" message and/or those who are unable to move the steering wheel after starting the vehicle.
- [N252512260](/bulletins/11020720.md), 2025-07-17, Service campaign: STEERING. Certain vehicles listed above may have a condition in which the fastener for the intermediate steering shaft to steering gear assembly may have suspect torque results. Dealers will replace and torque fastener.
- [25\-NA\-096](/bulletins/11019718.md), 2025-06-25, Service bulletin: STEERING; ELECTRICAL SYSTEM. This technical service bulletin provides information on the correction of the Steering Column Lock with the "Service Steering Column Lock" message or the inability to move the steering wheel after starting the vehicle.
- [PI0281L](/bulletins/11019516.md), 2025-06-12, Service bulletin: STEERING; POWER TRAIN; SUSPENSION. This preliminary informational \(PI\) bulletin provides information to dealership personnel that may be helpful when addressing underbody component corrosion with customers.
- [PIE0827](/bulletins/11019324.md), 2025-06-06, Service bulletin: EXTERIOR LIGHTING. This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards the headlamp, turn single and/or daytime running lamps flickering and/or inoperative.
- [13\-02\-32\-001H](/bulletins/11017868.md), 2025-05-06, Service bulletin: STEERING. This service bulletin provides a procedure to flush and bleed power steering system to correct a power steering noise or fluid leak concern that is caused during extremely low temperatures.
- [23\-NA\-185](/bulletins/11017255.md), 2025-04-28, Service bulletin: POWER TRAIN; ELECTRICAL SYSTEM; STEERING. This service bulletin helps diagnose/reduce possible CCND issues on Transfer Cases \- Service 4WD on DIC, Intermittent Failures, Noise Concerns, Driveline/Steering Vibration/Shudder, Intermittent DTCs/MIL Illuminated, Engagement/Disengagement/Ratcheting Concerns.

JSON: [/v1/bulletins/11019325](/v1/bulletins/11019325)

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