Service bulletin 16-NA-128

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)
Type	Service bulletin
NHTSA id	10097534
Published by NHTSA	2017-04-18
Manufacturer's number	16-NA-128
Manufacturer's date	2016-06-14
NHTSA component	ELECTRICAL SYSTEM; ELECTRICAL SYSTEM:SOFTWARE

NHTSA's summary

THIS TECHNICAL BULLETIN PROVIDES A PROCEDURE TO REPROGRAM THE BCM TO CORRECT A CUSTOMER CONCERN THAT THE SECURITY LIGHT IS ILLUMINATED AND DTC B2955 SET DUE TO THE BCM DETECTING A FALSE CIRCUIT FAULT ON THE IMMOBILIZER ANTENNA CIRCUITS.

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Electrical system, Software

Trouble codes named

B2955

Vehicles listed
BUICK ENCORE	2015, 2016
CHEVROLET TRAX	2015, 2016

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

Recalls for the same vehicles and component
16V422000	2016-06-10. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.
16V257000	2016-04-28. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.

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
20-NA-132	2024-04-05. Service bulletin. This warranty administration bulletin provides policy information on the requirements for 12V battery testing and warranty replacements.
PIP5632G	2023-01-30. 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.
PIP4902Q	2023-01-30. 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.
16NA019	2021-02-01. Service bulletin. This informational bulletin provides information on Transmission Adaptive Functions and Correcting Low Mileage Harsh Shifts, Slips, or Flares.
070849020P	2019-04-22. Service bulletin. This informational bulletin provides information for the IPC odometer programming method quick reference guide.
19NA057	2019-04-22. Service bulletin. This Technical bulletin provides a procedure for dealers/technicians to correct a condition of Malfunction Indicator Lamp (MIL) Illuminated, DTC P0420 Set.
PIT5236K	2019-04-08. Service bulletin. This Preliminary Information communication provides information to the technician about vehicles that have a Diagnostic Trouble Code B101D stored in Telematics Communication Interface Control Module. Technician will use Global Diagnostic System 2 to review the Firmware Over-the-Air version. If the Firmware Over-the-Air version on the scan tool equals 6708 the technician will need to contact General Motors Technical Assistance Center for further assistance. If the Firmware Over-the-Air version on the scan tool is lower than 6708 Dealer can order the part thought the Instrument Sales and Service website process.
PIP4723C	2019-04-08. Service bulletin. This Preliminary Information communicates to the dealer the process for downloading or updating operating software for the Tire Pressure Monitor, Active Fuel Injector tester, multi media tester, PICO Scope, GR8 starting/charging tester and Vehicle Data Recorder tools, giving website address and step by step instructions to complete the update.
18NA331	2019-03-25. Service bulletin. This bulletin provides a procedure to reprogram the ECM to correct a condition of MIL On, DTC P0420 Set.
PIT5444D	2019-03-11. Service bulletin. This Preliminary Information communication provides information to the technician about the text messaging feature on some newer General Motors infotainment systems. Pair the iPhone to the system then enter the Bluetooth settings menu, select the ?i? icon next to the vehicle name in the device and enable show notifications. The text messaging feature will be available on the next ignition cycle. However with iPhones text messages cannot be responded to when using the infotainment system, they can only be received. For android devices pair the phone to the system during the pairing process the phone will ask you to allow the vehicle to access the device contacts. A second question will pop up on the device asking to allow the vehicle to access the message access profile. Both have to be allowed for the text messaging feature to work.