Some units of the GMC Sierra 1500, Yukon, and Yukon XL trucks and SUVs need an ECM software update to fix a glitch with the ...

The Engine Control Module (ECM) is the computer responsible for controlling the engine. The ECM communicates with other vehicle control units via a communication bus.

Certain units of the 2023-2024 Chevy Silverado 1500 with the L3B engine are included in a Service Update with a fix for a fuel injector flow rate problem.

While your check engine light is obviously meant for engine issues, it can often give you clues to problems in other parts of the car as well.

Tim Shick, vice-president of sales support with Navistar, said most of the problems could be traced to the MaxxForce engine’s turbo air control valve, which connects directly to the engine’s ...