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Chevy Silverado and GMC Sierra 4x4 Questions

236 messages,  Last post on Nov 17, 2009 at 5:35 AM

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What is this discussion about? Chevrolet Silverado 1500, Chevrolet Silverado 2500, Chevrolet Silverado 3500, GMC Sierra 1500, GMC Sierra 2500, GMC Sierra 3500, Truck

#224 of 236 Re: grinding noise [dirtytire] by bruce48532 Sep 02, 2009 (1:06 pm)
Replying to: dirtytire (Aug 29, 2009 4:24 pm) not sure if you figured it out yet but, I would look to see if the the front drive shaft is engaged in 4 high. see if the front drive shaft is rotating while creeping forward, someone needs to look under the truck while moving forward.
#225 of 236 No light on push buttons on dash and no 4X4 by green39b Oct 05, 2009 (7:29 pm)
I have a 2003 Z71 with the auto track 4X4. Have used it several times at beach and at least once a month around the property. Noticed the orange light on the push button selector was not illuminated. Tried to shift between Auto and all 4X4 options. The light does not blink on any button and it doesn't sound or feel like it is going into 4X4. Any ideas? Replies to this message: coldshot02 (Oct 06, 2009 5:38 pm) green39b (Oct 07, 2009 8:57 am)
#226 of 236 Re: No light on push buttons on dash and no 4X4 [green39b] by coldshot02 Oct 06, 2009 (5:38 pm)
Replying to: green39b (Oct 05, 2009 7:29 pm) well it sounds like you had the same problem i did. what you should do is push the 4x4 button and look under your truck to see if your front drive shaft is spinning if so the u need a new actuator!! they go out alot unexpectedly! and if ur front drive shaft does not spin then it can be ur encoder box or ur 4x4 switch needs to be replaced! i think you can take ur truck to an auto shop and they will hook up one of those little code reader machines and it will tell them if there bad. they usually don't charge for that? Replies to this message: green39b (Oct 07, 2009 8:57 am)
#227 of 236 Re: No light on push buttons on dash and no 4X4 [coldshot02] by green39b Oct 07, 2009 (8:57 am)
Replying to: coldshot02 (Oct 06, 2009 5:38 pm) Thanks for the response above. I actually had the chance to use the dash switch from another truck with functional 4wd (all lights flash during start up). The other switch did not make my 4wd work and when I installed my switch into the other truck the red neutral light flashed once during start up, but the orange lights on the other buttons did not flash, or ever light up. I tried to engage 4wd in the other truck with my switch and nothing happens (making me think bad switch). I will try to get the truck on stands to see if the front driveshaft ever turns (working by myself). It's hard to believe that both the switch and either the actuator, or encoder went out at the same time. 15 amp fuse on side of dash is good, had a loose ground on battery, but did not solve the problem. Does the 4wd operate through one of the on board computers? Can there be 4wd codes and not show a warning light?
#228 of 236 1989 Chevy Silverado 4x4 Problems by bhanley55 Oct 07, 2009 (6:22 pm)
I havea 1989 Chevy Silverado 4x4 with a 5.7 liter motor and when I engage it into 4 wheel drive (4 wheel drive stick is on the floor and not a push button) it seems as if it is in low range because the gearing seems to change but when I gas it in dirt only the rear wheels spin, the same goes for 4 high. Also the light on the floor shifter does not light up.   I read through all of the forums and have seen that it could be the front acutator on the front diiferential or the encoder on the transfer case, but my question is that all of the other trucks were newer and were the type with the push button 4 wheeldrive. Could anyone tell me if they could or would be the same? If anyone has any suggestions please let me know because I miss my 4 wheel drive!!! Thanks! Replies to this message: zolten150 (Oct 12, 2009 4:03 pm) justintyme8303 (Nov 08, 2009 11:21 pm) 383stroked (Nov 17, 2009 5:35 am)
#229 of 236 04 Silverado transfer case by maw3 Oct 09, 2009 (8:36 am)
I have an '04 Silverado with the push button 4WD buttons. I just bought the truck used and it seems to be blowing the transfer case fluid out the vent line. I drained it a couple of weeks ago to see how much fluid was in it and only got about a half quart out. I refilled and it's low again and I keep getting the Service 4WD message intermittently. Does anyone have experience with this problem?
#232 of 236 Re: 1989 Chevy Silverado 4x4 Problems [bhanley55] by zolten150 Oct 12, 2009 (4:03 pm)
Replying to: bhanley55 (Oct 07, 2009 6:22 pm) hey! i have a 1992 chevy silverado z71 and have the EXACT problem with mine. i replaced my actuator and it did nothing. it gears right when i put it in 4 high or 4 low and i know its not the transfer case because when when i put it in 4 wheel when the truck is off the drive shaft stiffens and i cannot turn it. my light does not come on, but i hit a bump today and suddenly the 4x4 light came on when i tried it and i had 4 wheel drive! but then i suddenly lost it again.. i went under my truck and jiggled a couple wires in the front end and it started working again. i feel it is just a loose connection with the wire and it is not sending a signal from the transfer case telling it to engage in the front end.. i am going to work on it tomorrow and hopefully fix it for good. if anyone can help us out on this please do asap!
#233 of 236 Re: 1989 Chevy Silverado 4x4 Problems [bhanley55] by justintyme8303 Nov 08, 2009 (11:21 pm)
Replying to: bhanley55 (Oct 07, 2009 6:22 pm) I am having the same prob (same truck too) but mine started after i just had the tranny rebuilt. not sure if had anything to do with it. I have been under the truck and all is hooked up.

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