# Service bulletin PIT5544B

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: 10147373
- Published by NHTSA: 2018\-11\-13
- Manufacturer's number: PIT5544B
- Manufacturer's date: 2018\-10\-12
- NHTSA component: STEERING; STEERING:ELECTRIC POWER ASSIST SYSTEM

## NHTSA's summary

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.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2018/MC-10147373-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2018/MC-10147373-0001.pdf)

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

## Components

Steering, Power steering

## Vehicles listed

- 2016 to 2019 CHEVROLET SILVERADO 2500
- 2019 GMC SIERRA 1500
- 2016 to 2018 GMC SIERRA 2500

## 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.
- [17235](/bulletins/10158885.md), 2019-04-22, Service bulletin: EQUIPMENT ADAPTIVE/MOBILITY; STEERING; EQUIPMENT; STEERING:ELECTRIC POWER ASSIST SYSTEM. 17235 \- Service Update. On certain vehicles the electric power steering \(EPS\) rack gear teeth were not properly heat treated. Dealers will replace the EPS gear.
- [PIT5645](/bulletins/10154569.md), 2019-03-18, Service bulletin: STEERING:ELECTRIC POWER ASSIST SYSTEM. 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.
- [PIE0430](/bulletins/10140416.md), 2018-06-11, Service bulletin: STEERING:HYDRAULIC POWER ASSIST:POWER STEERING FLUID. This engineering informational bulletin is requesting information from the field on vehicles that have the condition of a service power steering message displayed and or a power steering fluid leak.
- [PIE0430A](/bulletins/10140348.md), 2018-06-11, Service bulletin: STEERING:HYDRAULIC POWER ASSIST:POWER STEERING FLUID; STEERING; STEERING:HYDRAULIC POWER ASSIST SYSTEM. This engineering informational bulletin is requesting information from the field on vehicles that have the condition of a service power steering message displayed and or a power steering fluid leak.
- [18075](/bulletins/10139290.md), 2018-06-04, Service bulletin: ELECTRICAL SYSTEM:12V/24V/48V BATTERY; STEERING:HYDRAULIC POWER ASSIST:HOSE, PIPING, AND CONNECTIONS. 18075 \- Service Update. Certain vehicles equipped with an auxiliary battery \(RPO K4B\) may have the ?buddy clip? to the high\-pressure power steering hose and two other clips for the auxiliary negative battery cable not attached consistently during assembly process. Inspect the ?buddy clip? and two auxiliary negative battery cable attachments and secure if required.
- [16\-NA\-313](/bulletins/10118959.md), 2017-10-15, Service bulletin: STEERING:HYDRAULIC POWER ASSIST:POWER STEERING FLUID. This informational bulletin provides information on a diagnostic procedure for a fluid leak on the power steering unit.
- [16\-NA\-175](/bulletins/10114106.md), 2017-08-15, Service bulletin: STEERING:HYDRAULIC POWER ASSIST:POWER STEERING FLUID. This technical bulletin provides a procedure to drain, flush and refill the transmission fluid to correct a customer concern of shake and/or shudder during light throttle acceleration between 48 and 104 KM/H \(30 and 65 MPH\) at a steady state.
- [PIT5544](/bulletins/10113365.md), 2017-08-15, Service bulletin: STEERING; STEERING:HYDRAULIC POWER ASSIST SYSTEM; STEERING:ELECTRIC POWER ASSIST SYSTEM. This Preliminary Information communication provides information to the technician about vehicles that have a hydraulic rush or flow type noise from the power steering gear. Dealer should communicate to the customer this condition is a normal operating characteristic of their vehicle.
- [PIT5405C](/bulletins/10113356.md), 2017-08-15, Service bulletin: ELECTRICAL SYSTEM; STEERING:ELECTRIC POWER ASSIST SYSTEM; STEERING:HYDRAULIC POWER ASSIST SYSTEM. This Preliminary Information communication provides information to the technician about vehicles that have a reduced or loss of power steering assist, steering wheel jerks or kicks back when turning, Service Stabilitrak message with warning chime, engine stall, Instrument Panel Cluster going blank or inoperative, radio/Integrated Center Stack going blank, Heater\-Vent\-Air Conditioning going blank, hood ajar message and/or dome lamps flash when shifting into reverse, alarm sounds when locking doors or door locks cycling, and or wipers continue to run for a short time after turning off and then stop/park in the incorrect location. Technician may find Diagnostic Trouble Codes U0073, U0078, U0029, U0028, U0415, U0140, U0126, U0121, U0101, U0100, C0544, C0710, U1510, B127B, B2605, B3600, C0800, U0428, U0452, U0131, and P0513 set in the vehicle. Check the body control module ground at the G218 location. The front dash insulator mat may be trapped between the ground eyelet and the body stud. Remove the round nut and eyelet and cut the front dash insulator mat away from the ground stud so it no longer interferes with the ground stud and reinstall the eyelet and ground nut. Technician will also inspect the starter solenoid battery cable for shorting out on the starter heat shield. Technician will need to voltage drop the battery cables. The battery should be tested using the GR8. X183 or X133 should be inspected for any broken/loose/backed out terminals.

JSON: [/v1/bulletins/10147373](/v1/bulletins/10147373)

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