2005 Envoy Trailblazer 4WD not engaging

No codes in system but no power to the front wheels. For 2002 - 2009 vehicles.

[@georgedreikhajamale8581]

Nice video

[@jorgeleon1173]

Hello, how can I diagnostic if my car has the same issue?

[@badertaqi2263]

Nice video could you do one explaining how to fix the 4low not engaging. Also what’s that new piece you just installed called so I can get one myself

[@dalemihocik4732]

Watch the video again and stop it at 2:24, you will see the part number on the box.

[@jesusalamillamorales4187]

Cómo pido la pieza para comprarla