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.

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.

It is customary to identify an injector by a number of different characteristics: its flow rate, fuel feed point, attachment to the fuel rail, electrical resistance, and tip design. In GM OE ...