GMC Sierra 1500 / 2500 / 3500:

Sierra 250hd 4x4 locked in 4lo

You are not logged in.

#1 9/28/2017 6:39 PM

Jeff
New member
Registered: 9/28/2017
Posts: 1

Sierra 250hd 4x4 locked in 4lo

This truck has 300,000 + miles and was having trouble going into 4 lo. I read manual and put it into neutral and then into 4 lo only to have it lock in 4 lo. I have attempted all the rolling and reverse tricks and will not go into 4 hi or any other transfer case gear. The switching motor sounds like it is attempting to move with no results...

GMC Sierra 1500 / 2500 / 3500 Recalls, TSBs and Service Information >> ALLDATA

Offline

 
Sponsored Links
ALLDATAdiy.com

The Leading Source of Professional Diagnostic and Repair Information.

#2 9/29/2017 8:53 AM

TechHelp2
Administrator
Registered: 11/23/2009
Posts: 1258

Re: Sierra 250hd 4x4 locked in 4lo

The truck needs to detect neutral and is required for shifts in and out of low range. Put into 4 wheel high then go through the the shift sequence P-R-N-D-N-R-P, repeat this a few times and see what happens. It may take many tries at this procedure.

If this doesn't work then at 300,000 miles I would have the switching motor checked out. It could just be to weak to push it back into 4 wheel high.


realworldautomotive.com
car and truck information like nowhere else
GMC Sierra 1500 / 2500 / 3500 Recalls, TSBs and Service Information >> ALLDATA

Offline

 
E-mail Page
Print Page
Save or Share Information
ALLDATAdiy.com is the leading source of factory diagnostic & repair information specific to your car.

Powered by PunBB
Copyright © 2007-2016  RealWorldAutomotive.com

Save or Share Automotive Information
Custom Search