2004 4WD not working

hathmanshelby · December 10, 2016

So I have a 2004 Chevy Silverado 2500HD with a 6.0 Vortec. I have the manual transfer case (not push button) and now when I try to shift it into 4 high or low it just doesn't work. Wondering if someone could tell me what it could be or where to start. Thanks

revrnd · December 10, 2016

You still have the electrical actuator in the front axle (located in the area of the diff'). They have been known to go bad.

dcheeseman · December 10, 2016

Yes I second that, I have a 1995 Chevrolet K1500 Silverado and one winter my actuator went out. After I pulled the shift level back to 4Hi, the front axle never locked. It's an easy fix, just unplug connector to it and unscrew actuator out.

Daniel

davester · December 10, 2016

I would suggest before buying a new actuator that you just unscrew the original one, plug it in again, then, with the truck on, have someone shift between 2 and 4wd and see if the actuator is going in/out.

Also check the 4wd fuse in the cab fusebox.

Formulabruce · December 11, 2016

If the shift arm on the floor cant make the trip, maybe rock the truck, or put in neutral and try

Swimmer8366 · December 11, 2016

Either it's that actuator or your transfer died also very common.

Sent from my Z981 using Tapatalk

revrnd · December 11, 2016

Kind of off-topic but the actuator has been a issue in the past. The GMT400s had a "Rube Goldberg" wax & heater mechanism for the actuator that didn't work too well in the cold. I think the solenoid type was intro'd around '97 or '98.