Silverado 2500 HD Transfer Case Shift Motor Dorman 600-914

This is the electric shift motor (encoder motor) that bolts to the transfer case on 2007-2019 Chevy Silverado 2500 HD and 3500 HD trucks with push-button or rotary-knob 4WD. When you select 4HI, 4LO or Auto, the transfer case control module drives this motor to rotate the shift shaft into range, and the built-in encoder reports the position back. Dorman 600-914 is a new assembly, not a rebuilt core, with a factory-style sealed connector.

Fits Chevrolet Silverado 2500 HD and 3500 HD 2007-2019 with the 6.0L or 6.6L, GMC Sierra 2500 HD 2007-2019 6.0L, Chevrolet Suburban 2500 and GMC Yukon XL 2500 2007-2013 6.0L, and Chevrolet Colorado 2015-2022. It cross-references to GM 19258697, 23319285 and 84115497. The half-ton 2007-2018 trucks use a different motor, so check the number on your old unit before ordering.

Typical failure symptoms: Service 4WD message, selector lights flashing and never going solid, the truck stuck in 2HI or stuck in 4HI, or a clicking noise from the transfer case when you change ranges. Road salt and water getting into the motor connector is the usual killer on HD trucks. Before replacing, check the transfer case fuse, look for green corrosion in the connector, and scan for encoder or motor circuit codes. A good motor with no command voltage points at the switch, harness or control module instead.

On the bench: disconnect the battery, unplug the connector, remove the mounting bolts and pull the motor straight off the shift shaft. Note where the shaft flats sit and line the new motor socket up with them rather than forcing it on. Bolt it down, plug it in, and cycle 2HI, 4HI, and 4LO with the engine running and the truck rolling slowly to confirm every range engages and the lights go solid.