Why does my transfer case change to auto 4WD?

Why does my transfer case change to auto 4WD?

Today I got in my truck and as I was goin down the road I looked and the transfer case was in neutral and the light was red, then earlier this week it changed into auto 4wd on its own. Any suggestions on what’s the problem or how to fix it?

How can I switch my truck from neutral to 4WD?

The one on the dash. try taking the tranfer case motor out cleaning the plugs and putting it back in also! Ok is it hard to take the transfer case motor out? When your truck does that, can you switch it out of neutral and/or auto?

Where is the encoder motor on a GM transfer case?

Access to datastream information for GM’s NVG 246 system makes most problems simple to locate and diagnose, as our case studies demonstrate. These systems also allow bidirectional control for many outputs. The encoder motor (arrow) is mounted on the front of the transfer case and is used to lock it into 4WD.

What is mode control on GM transfer case?

The dash buttons to the right of the air vent identify this system as an NVG 246 automatic two-speed, which means it has DTCs and scan tool capabilities. mode control is a set of normally open switches that vary the voltage supplied by the transfer case module when closed.

How does the 4WD selector switch light work?

4wd selector switch lights work, and will switch from auto 4wd, 2wd, 4hi and 4lo but the 4wd does not engage. While driving down the road, transfer kicks out of 2 wheel high and goes into neutral. the only way to get the vehicle to move is to put into auto 4wd.

Why does my Yukon XL have a 4WD light?

I was recently getting a service 4wd light in my 03 yukon xl. the lights for the switch also went out. I crawled under the truck and started looking at connections to the transfercase. I found that one of the connections had a small amount of corrosion in it. I pulled it apart, sprayed it with contact cleaner and reassembled.