clwilliams

I tested the actuator before I installed it by changing from 2 high and 4 and back with the key on but engine off. Preformed as it should. As far as the axles I think I would hear something it that were the case, but worth a shot. Thanks!

Hello all, I've got a 2000 Sierra 4wd 5.3 litre with a push button 4wd issue. 4wd not engaging at front end. I replaced the actuator on the front diff. The lights indicate gear change and I can hear the motor. It is engaging low, but no drive at front end. In 2 high I can turn the front driveline manually, but not in 4 high. No drive at front wheels in any gear. Did I get a bad actuator? Could there be another problem? Thanks all