# Service bulletin 18NA032

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: 10137317
- Published by NHTSA: 2018\-05\-21
- Manufacturer's number: 18NA032
- Manufacturer's date: 2018\-02\-08
- NHTSA component: ELECTRICAL SYSTEM; EXTERIOR LIGHTING:TURN SIGNAL:SWITCH

## NHTSA's summary

This technical bulletin provides a procedure to replace the turn signal switch with the correct one due to the wrong one being installed at the plant.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2018/MC-10137317-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2018/MC-10137317-0001.pdf)

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

## Components

Electrical system, Lighting, Turn signals

## Vehicles listed

- 2018 GMC TERRAIN

## Other bulletins for the same vehicles and component

- [17427](/bulletins/10191105.md), 2021-04-30, Service bulletin: ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL; EXTERIOR LIGHTING:TURN SIGNAL; ELECTRICAL SYSTEM:SOFTWARE. Condition Certain 2018 model year GMC Terrain vehicles equipped with a trailer package \(RPO V92\) may have a trailer turn signal and brake lamp that is inoperative on a connected trailer due to an incorrect calibration. Correction Dealers are to reprogram the body control module.

JSON: [/v1/bulletins/10137317](/v1/bulletins/10137317)

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