Hummer H3 2006-2010 Transfer Case Shift Motor 600-943

This is the electric shift motor that bolts to the side of the transfer case on the 2006-2010 Hummer H3 and the 2009-2010 H3T pickup. It replaces GM 19300596 and crosses to Dorman 600-943. It has a rectangular 7-blade connector on a short pigtail harness. Mounting bolts are not included, so reuse the originals.

When this motor fails, the truck stays in the range it was last in. You press the 4HI or 4LO button and nothing happens, the selector lights blink, or the dash shows a Service 4WD message. Before you replace the motor, check the transfer case fuse and relay. Then confirm the module sends voltage to the motor connector when you select a new range. If voltage is there and the motor does not turn, the motor is bad.

Before you pull the old motor, put the transfer case in 2HI and note where the shift shaft sits. The new motor has to line up with the shaft in the same position, so do not force it on. Check the connector for green corrosion at the same time, because a bad pin causes the same symptoms as a dead motor.