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Service bulletin 20NA014

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 id10174277
Published by NHTSA2020-04-27
Manufacturer's number20NA014
Manufacturer's date2020-03-11
NHTSA componentENGINE; ELECTRICAL SYSTEM:SOFTWARE

NHTSA's summary

This technical bulletin is providing a procedure to reprogram the ECM to correct a condition of Runs Rough Cold or Stall Condition Upon Cold Start and/or DTC U18A2 Set (North America /Middle East- Terrain Only).

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

Electrical system, Engine, Software

Trouble codes named

U18A2

Vehicles listed
CHEVROLET EQUINOX2018, 2019
GMC TERRAIN2018, 2019

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

Other bulletins for the same vehicles and component
20-NA-1322024-04-05. Service bulletin. This warranty administration bulletin provides policy information on the requirements for 12V battery testing and warranty replacements.
PIP5632G2023-01-30. Service bulletin. This Preliminary Information communication provides information to the technician that General Motors Technical Assistance Center may ask for Global Diagnostic System 2 Session Log. Technician will need use Global Diagnostic System 2 to send the session logs to General Motors Technical Assistance Center for further assistance on the vehicle in question.
PIP4902Q2023-01-30. Service bulletin. This Preliminary Information communication provides information to the technician that General Motors Technical Assistance Center may ask for Global Diagnostic System 2 Session Log. Technician will need use Global Diagnostic System 2 to send the session logs to General Motors Technical Assistance Center for further assistance on the vehicle in question.
PIP58142023-01-30. Service bulletin. This Preliminary information communicates that there some service parts released to dealers missing software.
20NA1712021-12-27. Service bulletin. This service bulletin provides repair information to correct a customer concern of software issues with Radio Software Version V808.
174272021-04-30. Service bulletin. 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.
17-NA-3302021-04-15. Service bulletin. Normal Characteristic – Push to Talk Button on Steering Wheel Control is Inoperative Condition Some customers may comment on one of the following conditions: 1. The push to talk button on the steering wheel control is inoperative when there is no phone device is paired with the vehicle. Note: The push to talk button, however, still answer OnStar hands-free calls (if equipped). 2. Cannot delete USB names from the radio display. The Radio displays the names of USB drives that were previously installed and have been removed. Cause This condition may be due to one of the following: Condition 1, no action is required. It is normal operation if you do not have a phone device paired with the vehicle via Bluetooth. Condition 2, the radio displays the last 3 sources used for the radio like AM, FM, XM, Bluetooth device streaming music or USB drive. The sources are highlighted/actively listed even after the source is removed from the system. To delete the name of the USB from the radio display, push the more button on the display and select another radio sources like AM, FM or XM. Note: The radio will show the last 3 audio sources after removed, as shown in the illustration above Correction DO NOT replace the radio assembly as this is a normal design characteristic for the infotainment system.
17-NA-3252021-04-15. Service bulletin. DTC B1265 Entertainment System Remote Enable Circuit Condition Some customers may comment on a malfunction indicator lamp illuminated. During diagnosis a technician may find DTC B1265 present or stored in history. Cause This may be due to an incorrect calibration loaded into the vehicle at assembly. Correction Reprogram the radio with the latest calibrations.
16NA0192021-02-01. Service bulletin. This informational bulletin provides information on Transmission Adaptive Functions and Correcting Low Mileage Harsh Shifts, Slips, or Flares.
20NA1712020-10-26. Service bulletin. This technical bulletin provides repair information to correct a customer concern of software issues with Radio Software Version V808.