Hi all,

I have already replaced the dash selector switch on my 2003 Silverado. I tought it would fix my 4wd problem. I later found a blown fuse on the engine compartment fuse box (TREC 30 amps). Replacing the fuse didn't do better. I decided to unpluged the front differential selector motor. Doing so, i realized this little motor was functionning good. While running with the front diff. selector motor unpluged, the Auto4wd light was blinking and the truck was running on 2wd. I pushed the plug back in and run the truck with the Auto4wd light lit and the Auto4wd was doing its job, running on 2wd or 4wd depending on road condition. Curiously, no more fuse blowing! The issue now is there no way to change from Auto4wd to anything else. The selection light will blink for a few secondsand it will go back to Auto4wd mode. I can't run on 2HI nor onother selection.

I believe the 30 amps fuse is for the encoder motor electric circuit. I thought the problem would be the encoder motor as it was blowing30 amps fuses, but not since the front diff. selector motor was unpluged and plug back in.

I am stuck with this uncorrected issue and no more idea of where to go from here? Need help please

 

I'm sorry, not to rub your nose in your mistake, but for the benefit of all,(once again) there's a good reason most serious 4WD drivers and shops recommend manual transfer case selectors. I'd advise either seeing what it would cost to get a manual installed, or trade to a truck that has one. If you're going to be using a truck that has 4wd a lot.

 

I will certainly look for a manual transfer case selector installation in the near future. For the present time, this problem need to be looked at. I am confident that this forum provides more knowledge people than a simple dealership service shop. Having said that, if this issue is resolved, a bunch ofSilverado owner will be happer to learn more about transfer case malfunction.

Waiting for more feedback,

Thanks,