Driver Side Engine Compartment Outer Rail Extension – GM (23384192)

Driver Side Engine Compartment Outer Rail Extension routes fluid through the engine bay or underbody. The crimp or flare is the usual failure point, and it fails from vibration rather than from pressure.

Replace the Outer Rail Extension when a leak appears at a flare or when the line has been bent close to a heat source. Routing must follow the original path or it will chafe.

Reference number for the Outer Rail Extension: 23384192. It is filed under Complete Engines, and it is the number that has to match the part coming off the vehicle.

The stock here is genuine GM, and this Outer Rail Extension keeps the original engineering number, which matters once a number has been superseded more than once.

Position matters here: this is the driver (left-hand) unit, and fitting it to the other side will not work.