4x4 problems

Hello everyone. I'm only mechanically inclined enough to get myself in trouble. But here I am. A year into a "all it needs is a" project 04.5 Sierra SLT. I've replaced what needed replacing and then some. Truck is near done. Just a couple bugs. I've searched high and low on the c0379 code. But...

I just recently picked up and 08 Sierra LMM, but I’m having trouble with my 4x4. The indicator takes a while to say its in 4x4, but it engages the transfer case just fine and spins the front drive shaft. I also replaced the actuator on the front differential, but it’s still not working, and I...

Hey guys. My truck is stuck in 4 high. I can’t seem to find anything on YouTube on how to fix it. It’s a 2003 Silverado 2500HD. I have bought an electric actuator to replace on the T-Case. I have also heard about some Vacuum lines that could be the issue. I can’t find much on YouTube about those...