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Service bulletin 21NA139

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 id10200140
Published by NHTSA2021-08-09
Manufacturer's number21NA139
Manufacturer's date2021-06-21
NHTSA componentELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM)

NHTSA's summary

This service bulletin provides a repair procedure to correct a customer concern of a Malfunction Indicator Lamp (MIL) Illuminated - DTC P3055 Set.

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, Engine control module

Trouble codes named

P3055

Vehicles listed
BUICK ENCLAVE2017, 2018, 2019, 2020, 2021
BUICK LACROSSE2017, 2018, 2019
BUICK LACROSSE2020
BUICK REGAL2018, 2019, 2020
CADILLAC CT62017, 2018, 2019
CADILLAC XT42019, 2020, 2021
CADILLAC XT52018, 2019, 2020, 2021
CADILLAC XT62020, 2021
CHEVROLET BLAZER2019, 2020, 2021
CHEVROLET CRUZE2017, 2018, 2019
CHEVROLET EQUINOX2018, 2019, 2020, 2021
CHEVROLET MALIBU2017, 2018, 2019, 2020, 2021
CHEVROLET SILVERADO 15002019, 2020, 2021 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET TRAVERSE2018, 2019, 2020, 2021
GMC ACADIA2018, 2019, 2020, 2021
GMC SIERRA 15002019, 2020, 2021 (the catalog's model; the bulletin names a series or trim of it)
GMC TERRAIN2018, 2019, 2020, 2021

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

Recalls for the same vehicles and component
21V3460002021-05-13. ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE

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
PIT5687A2024-02-12. Service bulletin. This Preliminary information communicates some diagnostic tips to inspect for no/low voltage at the ECM for a customers complaints of a SES MIL, Crank No Start, stalling DTC's: P16A7 and/or P16AF.
PIP5628F2023-05-15. Service bulletin. This Preliminary information communicates information that will need to be provided to TAC to aid in diagnosing if a vehicle comes in with misfire and DTC Codes P0300 - P0308 and/or P050D
PIP58952023-01-30. Service bulletin. This Preliminary information communicates to the technician the need to inspect connector for moisture intrusion at ECM, procedure for verification of need for replacement
N2223725922023-01-07. Service bulletin. Service Update. Certain vehicles may have a condition in which ice or sludge can accumulate in the Charge Air Cooler (CAC) or Closed Crankcase Ventilation (CCV) system when driving in extremely cold weather conditions (-18°C (0°F) or less). Dealers will install a radiator air front lower baffle and, if necessary, reprogram the Engine Control Module.
22NA0362022-07-18. Service bulletin. Vehicle Odometer Not Matching Display after ECM, BCM or IPC Controller Replacement.
21NA1132022-06-21. Service bulletin. This technical bulletin provides a procedure to perform a learn procedure for the turbo actuator.
20NA0902022-06-21. Service bulletin. This informational bulletin provides a way for the technician to identify if the ECM has been modified.
PIE07032022-06-10. Service bulletin. This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to Intermittent No Start But Vehicle Has Power.
183482022-05-31. Service bulletin. Service Update. Some vehicles may set DTC P189D and display SERVICE SHIFTER SEE OWNER?S MANUAL on the Driver Information Center (DIC). When this message is displayed, the vehicle will go into N (Neutral) once the vehicle?s speed is below 6 mph (10 km/h), and then into P (Park) once the vehicles speed goes below 3 mph (5 km/h). The customer will be able shift and drive the vehicle per instructions in the vehicle Owner?s Manual. Dealers are to reprogram the engine control module (ECM) with an updated software and calibration.
20NA1972022-05-31. Service bulletin. This technical bulletin provides a procedure to inspect and repair the fuel pressure sensor if found the cause of the customers concern.