# Service bulletin 020522004B

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: 10000171
- Published by NHTSA: 2003\-02\-14
- Manufacturer's number: 020522004B
- Manufacturer's date: 2002\-10\-01
- Replaces: 020522004A
- NHTSA component: EXTERIOR LIGHTING:BRAKE LIGHTS; SERVICE BRAKES, HYDRAULIC

## NHTSA's summary

TRAILER BRAKES APPLIED WHEN HEADLIGHTS / PARK LAMPS ARE ON, BRAKE CONTROLLER ILLUMINATION. \*TT

## The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

## Components

Brakes, Lighting, Brake lights

## Vehicles listed

- 2002 to 2003 CADILLAC ESCALADE
- 2002 to 2003 CHEVROLET AVALANCHE
- 1999 to 2003 CHEVROLET SILVERADO
- 2000 to 2003 CHEVROLET SUBURBAN
- 2000 to 2003 CHEVROLET TAHOE
- 1999 to 2003 GMC SIERRA
- 2000 to 2003 GMC YUKON
- 2003 HUMMER H2
- UNKNOWN UNKNOWN1

## Other bulletins for the same vehicles and component

- [02\-08\-42\-001I](/bulletins/10116890.md), 2017-08-31, Service bulletin: EXTERIOR LIGHTING:HEADLIGHTS; EXTERIOR LIGHTING:BRAKE LIGHTS; EXTERIOR LIGHTING:BACK UP LIGHTS. This informational bulletin provides an out line on Headlamp, Tail Lamp, License Lamp or Fog/Driving Lamp Damage and what should be considered warranty replacement and not

JSON: [/v1/bulletins/10000171](/v1/bulletins/10000171)

[Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%20020522004B&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F10000171&vehicle=Service%20bulletin%20020522004B)