Last post on Nov 16, 2013 at 4:26 PM
You are in the Chevrolet S-10 & GMC S15 Sonoma
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Chevrolet S-10, Truck
#52 of 61 Re: 4wd acting up [kraigncharity]
Nov 20, 2011 (6:35 pm)
Hey: Did you ever find out what the problem was. I have a 2003 S10 and exactly the same thing just happened. Let me know if it was fixed.
#53 of 61 My Sonoma , GMC 2001 4x4 not engageing
Dec 12, 2011 (4:29 pm)
My truck has the exact problem as this person #38
Problem: 4Hi and 4Lo won't engage, Low xfer case engages but front wheels don't.
Symptoms: When I bought this truck used I noticed that after engaging 4Hi
there was a vibration around 50-65mph. After 20-30 miles the vibration would
Didn't use 4Hi/4Lo for quite a while.
After recent snow storm when I tried to use 4Hi. Upon disengaging there was
an oscillating vibration that would lower in frequency until stopping front
wheels. When accelerating noise is not heard, only when coasting or decelerating. At this time the vehicle was out of 4wd. Vibration did not go away after 20-30 miles.
Just the other day after another snowstorm, I tried the 4Hi/4Lo and it won't
engage 4WD only low range. I get ONLY a click for 4Hi and a click and a clunk
for 4Lo. Seems as though I get the low range but the front axle won't engage.
When engaging the 4Hi and traveling 5-10 miles I heard an occasional couple of knocking noises from what appears to be the right front wheel/hub. Pressing 2Hi button stops these random knocking noises.
The lights corresponding with the buttons on dash work properly i.e. 4Hi lit
when 4Hi pressed and 4Lo lit when 4Lo pressed, 2Hi lit when 2Hi pressed.
What suggestions does anyone have and what should I check for?
#54 of 61 My Sonoma , GMC 2001 4x4 not engageing by jjflynn71
Dec 12, 2011 (7:23 pm)
under the battery tray there is a actuator that pulls the front deferential into gear.. check the vacuum lines to the actuator and the cable from it .. sounds like that seems to be your problem
#55 of 61 Re: @ gmcustsvcsarah [gmfanatic]
Dec 13, 2011 (4:04 am)
update replaced my encoder(transfer-case shift motor) again now all is well everything works
#56 of 61 Transfer Case will not go back into 2X4
Jan 11, 2012 (4:25 pm)
My problem seems to be unique. My 98 S10 will go into 4 wheel high or low with no issues under any condition. However, it will not go back into 2 wheel drive unless the trauck has sat and cooled. Then, at that point it will go right back in. Any ideas?
#57 of 61 Truck wants to disengage out of 2wd, i think.
Mar 25, 2012 (8:43 pm)
I have a 2003 ZR2, when i get on the freeway and get above 65mph after about 5 min. i will here a high pitch whine and when i start to slow down and pull over the whine gets louder and sounds more like a grinding sound but then i will hit the 4hi button and the grinding stops so i just keep driving down the freeway for a few seconds and hit the 2hi button and it goes back into 2hi and i don't here the whine anymore until i get about 1 mile down the highway it starts whining again and i have to hit the 4hi button again to make it stop. Am i loosing vacuum? is something trying to disengage? i have a brand new vacuum actuator and 4 wheel drive works great when i need it but even before the old actuator went bad i had this problem with the truck wanting to disengage while driving on the freeway.help.
#58 of 61 Re: Truck wants to disengage out of 2wd, i think. [onewackycamper]
Oct 07, 2012 (5:55 pm)
Hi did you ever get a answer to this problem? I have the same problem with my2002 ZR2. Can you or anyone else help?
#59 of 61 95 Sonoma 4x4 problems
Jun 02, 2013 (6:47 am)
yesterday i had to put my truck into 4lo to get up a hill in my yard. once i got to the top it wouldnt shift back into 2hi it feels like something was pushing back when i tryed to push on the shifter. it would shift into neutral on the 4x4 shifter and drive forward while in the neutral position and it will go into 4hi but wont shift out of first unless you did it manually then it only goes up to 3rd. it also makes a quick grind sound when you put it into park and when going forward and reverse it will shift hard
#60 of 61 4X4 Hi unexpectedly
Oct 20, 2013 (6:28 am)
My 2001 Sonoma will suddenly engage 4X4 Hi as I am driving down the highway at 60 MPH. When I pull over I can get it to go back into 2W drive, but it might happen again in a mile, or in 20 miles. It truly is in 4 wheel drive, I can tell when I turn the front wheels, and have to back up to get 4X4 Hi to disengage.
#61 of 61 Re: chevy s10 4x4 problem [chevys11]
Nov 16, 2013 (4:26 pm)
I had this problem before it was my encoder motor on thr transfer case had it changed works fine now