Transfer Case Selector Switch – ACDelco (84306930)

Transfer Case Selector Switch 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 Case Selector Switch 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 Case Selector Switch: 84306930. It is filed under Sensors & Switches, and it is the number that has to match the part coming off the vehicle.

This is ACDELCO dealer-sourced stock rather than an equivalent, so the number on the Case Selector Switch traces straight back to the manufacturer.