05 Trailblzr Lt 4x4 (fwd) Malfunction

[JoshuaGAbell]

Well, I have a 2005 Chev Trailblazer LT with a 4.0L V6 and the 4x4. When I use the 4x4 switch the lights function on the switch, I can hear the "hum" of something working and then a couple of "clicks" under the vehicle. However, when I use the accelerator only the RWD is operational.

 

Normal 2HI is functional and even with 4x4 engage the truck works fine, other than the FWD apperaing not to engage.

 

Is there a relay or fuse that may be casuing an issue?

 

Any suggestions or comments are greatly appreciated.

[sahls01gmc]

Bump

 

 

I have the exact same issue with my truck, although different model.

 

I will await your responses and diagnose my own situation.

 

 

James