GM has included the 2020 through 2023 Cadillac CT4 in a service update fix for a fuel injector flow rate issue, available free of charge to owners through 2039.

The computer regulates the electronic fuel-injector pulse width (the time that the fuel injector is open) and ignition lead with input from various sensors.

Certain units of the 2023-2024 GMC Canyon pickup are included in a new GM Service Update containing a fix available for a fuel injector flow rate problem.

The study concludes that by combining high-resonant frequency flow tubes with the Prism technology in a new instrument—the fast next-generation Coriolis (fast NGC) flow meter—it will be possible to ...