Injector – GM (12721341)

Injector is part of the circuit that reports engine or transmission behaviour back to the control module. It is read continuously, and a value that drifts out of range sets a fault code long before the driver notices anything.

Replace the Injector when the code returns after clearing, when the live data reading is out of range at operating temperature, or when the housing shows heat damage. Check the ground and the connector pins first.

This Injector is listed as part 12721341 (Fuel Injectors). Where a number has been superseded, the current reference is the one that ships, so check any supersession note before ordering.

This is genuine GM stock, supplied for the Injector with the manufacturer number intact so the reference on the box matches the catalogue.