# Service bulletin PIT5645

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: 10154569
- Published by NHTSA: 2019\-03\-18
- Manufacturer's number: PIT5645
- Manufacturer's date: 2018\-12\-07
- NHTSA component: STEERING:ELECTRIC POWER ASSIST SYSTEM

## NHTSA's summary

This Preliminary information communicates and issue with a Service Power Steering Message DTC C144B or Clunk Noise At Full Steering Lock Turns AFTER Installation Of Accessory Lift Kit. GM Engineering is working on updated calibrations for the power steering control module to correct these issues.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2018/MC-10154569-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2018/MC-10154569-9999.pdf)

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

## Components

Steering, Power steering

## Trouble codes named

C144B

## Vehicles listed

- 2019 CHEVROLET SILVERADO 1500
- 2019 GMC SIERRA 1500

## Other bulletins for the same vehicles and component

- [23\-NA\-201](/bulletins/10247549.md), 2023-12-21, Service bulletin: EQUIPMENT:ELECTRICAL; ELECTRICAL SYSTEM; STEERING:ELECTRIC POWER ASSIST SYSTEM; STEERING; SERVICE BRAKES, HYDRAULIC; SERVICE BRAKES, HYDRAULIC:POWER ASSIST. 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.
- [PIT5544B](/bulletins/10147373.md), 2018-11-13, Service bulletin: STEERING; STEERING:ELECTRIC POWER ASSIST SYSTEM. This Preliminary information communicates information on ahydrauilc rush type noise from the power steering gear. This noise is a characteristic of the new Active Hydraulic Assist System RPO NV8 and no repairs should be made. The noise is most noticeable in the cab at idle, in park, with all accessories turned off.

JSON: [/v1/bulletins/10154569](/v1/bulletins/10154569)

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