Injector – GM (12738848)

Injector is an electrically controlled component in the engine or transmission management system. Because the module cross-checks it against other inputs, a fault here often surfaces as a code for a different circuit.

Replace the Injector when a value freezes or drops out intermittently, which usually means an internal fault rather than wiring. Wiggle-testing the harness while watching live data separates the two.

Reference number for the Injector: 12738848. It is filed under Fuel Injectors, and it is the number that has to match the part coming off the vehicle.

Genuine GM part for the Injector. Where the manufacturer has superseded a number, the current reference is the one that ships.