Some Chevy Silverado Units With The Turbo 2.7L Engine Require A Fuel Injector Fix

Certain units of the 2019 through 2022 Chevy Silverado 1500 pickup motivated by the turbocharged 2.7L I4 L3B gasoline engine are included in a new GM Service Update containing a fix available for a fuel injector flow rate problem.

The Engine Control Module (ECM) of the affected Chevy Silverado units is incorrectly programmed, per Service Update N242450631, potentially leading to improper fuel flow rate during certain types of driving.

As a reminder, the turbocharged 2.7L I4 L3B engine involved in the Service Update develops 310 horsepower and 348 pound-feet of torque in the 2019, 2020 and 2021 Chevy Silverado 1500. It provides the same output in the pre-refreshed 2022 Silverado 1500 Limited, but received a torque boost – with a rating of 310 horsepower and 430 pound-feet of torque – in the refreshed 2022 Silverado 1500.

The exact number of affected units is currently unclear. GM instructs dealership service to apply the available fix both to any vehicles still in stock and to affected Chevy Silverado trucks brought in by their owners for other service. The repair is offered free of charge through September 30^th, 2039 to current owners of the vehicles.

No components need to be replaced in order to repair the fuel injector flow rate. To calibrate the flow rate correctly, the service personnel are to reprogram the Engine Control Module with new settings. The whole process, including verification of the issue and reprogramming of the ECM, takes about 30 minutes on average.

Three other engine options for the affected model years, including the naturally aspirated 5.3L V8 L84 gasoline engine developing 355 horsepower and 383 pound-feet of torque, the naturally aspirated 6.2L V8 L87 gasoline engine rated at 420 horsepower and 460 pound-feet, and the 3.0L I6 LM2 turbodiesel Duramax rated at 277 horsepower and 460 pound-feet, are not affected by the issue or included in the Service Update.

For structure, the Silverado utilizes the GM T1 platform, while production takes place at the GM Silao Plant in Mexico, the GM Fort Wayne Assembly facility in Indiana, and the GM Oshawa Plant in Canada.