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Service bulletin 18027-01

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10145173
Published by NHTSA2018-10-09
Manufacturer's number18027-01
Manufacturer's date2015-08-10
NHTSA componentSTEERING:ELECTRIC POWER ASSIST SYSTEM; STEERING

NHTSA's summary

18027-01 - Customer Satisfaction Program - Certain vehicles may have been built with a connector between the electric power steering motor and torque sensor that has a potential for fretting corrosion. If this condition exists, power steering may be lost, and the driver may experience unanticipated increased steering effort as the vehicle reverts to manual steering. A chime will also sound in the vehicle, and a ?Service Power Steering? message will appear on the Driver Information Center (DIC). Manual steering functionality will be maintained but will require additional effort, particularly at lower speeds. Dealers are to replace the complete power steering rack assembly.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Steering, Power steering

Vehicles listed
CHEVROLET COLORADO2015
GMC CANYON2015

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
21V2130002021-03-25. STEERING:ELECTRIC POWER ASSIST SYSTEM
16V0540002016-02-01. STEERING:ELECTRIC POWER ASSIST SYSTEM

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
180272018-08-20. Service bulletin. 18027 - Customer Satisfaction Program. Certain vehicles may have been built with a connector between the electric power steering motor and torque sensor that has a potential for fretting corrosion. If this condition exists, power steering may be lost, and the driver may experience unanticipated increased steering effort as the vehicle reverts to manual steering. A chime will also sound in the vehicle, and a ?Service Power Steering? message will appear on the Driver Information Center (DIC). Manual steering functionality will be maintained but will require additional effort, particularly at lower speeds. Dealers are to replace the complete power steering rack assembly.
PIT53092017-08-15. Service bulletin. This Preliminary Information communication advises the technician that the electric steering gear part numbers 22963309 and 22963310 will be placed on restriction through General Motors Product Quality Center. Dealer will need to contact General Motors Product Quality Center for further assistance.
PIT5309A2017-03-16. Service bulletin. THIS PRELIMINARY INFORMATION COMMUNICATION ADVISES THE TECHNICIAN THAT THE ELECTRIC POWER STEERING GEAR WILL BE PLACED ON RESTRICTION THROUGH PRODUCT QUALITY CENTER (EFFECTIVE 9-10-2014) TO ASSIST GM ENGINEERING WITH PRODUCT FEEDBACK. DEALER WILL NEED TO CONTACT GENERAL MOTORS PRODUCT QUALITY CENTER FOR FURTHER ASSISTANCE.
SB-16-NA-1092016-08-06. Service bulletin. "THIS TECHNICAL BULLETIN PROVIDES A PROCEDURE TO INSPECT THE STEERING GEAR FOR A NORMAL CONDITION OF GREASE OR SEALANT ON EXTERIOR CASE OF GEAR DUE TO THE MANUFACTURING PROCESS."
PIT5437B2016-07-07. Service bulletin. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
SB-154392016-06-22. Service bulletin. SUMMARY TO BE PROVIDED ON A FUTURE DATE.