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Chevy Silverado and GMC Sierra 4x4 Questions

239 messages,  Last post on Dec 01, 2009 at 1:47 PM

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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

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#34 of 239 '03 Silverado 4wd issue... by brodie17 Sep 14, 2007 (10:47 am)
#35 of 239 '03 Silverado 4wd issue... by brodie17 Sep 14, 2007 (10:47 am)
I have an 03 Silverado Z71 ext. cab. and just recently the 4wd system has been acting up...   I have the AutoTrac system and when I go to turn the truck on, sometimes it says it is in 4wd, auto or neutral. It then tells me to service 4wd, no other lights are on and I'm not turning on anything...   Most the time it is normal and in 2wd when I turn it on.   Mechanically the sytem works like normal when I want to go 4wd I just push the button as normal and it works...
#36 of 239 Re: 1998 1500 Z71 4x4 button lights [351suckazz] by contractorkev Sep 30, 2007 (4:09 am)
Replying to: 351suckazz (Jan 31, 2007 6:31 pm) Mine is 2004, but does the same thing. Have had it fixed twice under warranty (now out of warranty)and happening again. There is a Tech service bulletin on this, your mechanic friend should be able to pull it up on his computer
#37 of 239 2007 1500 4h driving on smooth roads by jsorensen Oct 02, 2007 (6:46 pm)
I noticed today that my transmission was in 4H as I was driving down the freeway. Not sure how it got there and not sure how many miles I drove it this way. Is this an issue with this knob? Further, have I damaged the vehicle?
#38 of 239 4x4 makes a whining noise by geno57 Oct 20, 2007 (5:22 am)
i have a 2000 gmc 1500 4x4 it makes a whining noise at any speed it gets louder at highway speeds and the truck has 214,000 miles Replies to this message: 1offroader (Oct 20, 2007 9:56 am)
#39 of 239 Re: 4x4 makes a whining noise [geno57] by 1offroader Oct 20, 2007 (9:56 am)
Replying to: geno57 (Oct 20, 2007 5:22 am) geno57   You've probably got a bad bearing somewhere but without more info. it is impossible to diagnose. Could be wheel bearing, transmission, transfer case, rear diff. Does it vary with vehicle speed or engine speed? Example: If it's a power steering pump it will make the noise under the hood even though the vehicle isn't moving. Rev the engine with the hood up and listen. If there is no noise it is somewhere in the drive train. You could put all 4 corners up on jack stands, have someone put the truck in Drive, and listen to each wheel bearing as the wheels turn, and crawl around underneath and see where the noise is coming from - transmission, transfer case, etc. Be careful with that, make sure the truck is secure before doing anything like that, and don't get any loose clothing near any spinning items in the drive train. Even if you find the location of the noise it might not be something you can repair yourself unless you are very sophisticated, in which case you probably already know what I've just told you. Good luck.   1offroader
#40 of 239 4x4 manual shifting by grampy1 Nov 03, 2007 (11:09 am)
2004 Sierra auto. manual 4x4 shift on the hump. I have been told,and the manual says that i can "shift on the fly" from 2 wd to 4wheel high at any speed below something like 45 miles per hour,and back. When i try to shift from 2 wheel to 4 wheel at say 25 mph ,its like shifting a standard tranny without the clutch.  I guess i'm expecting that the S.O.F. to be smooth. Truck has done this since new, especially when cold. Manual says you can shift while truck is in motion.  Thoughts from 4x4'rs appreciated.
#41 of 239 Duramax Front Wheelhub Assemblies by djm10 Dec 01, 2007 (1:56 pm)
I have a 2004 2500 crew cab duramax 4x4, my father in law has the same truck and my brother in law has a 2001 2500 crew cab 4x4 with the 8.1l in it and we all have had problems with front wheel hub assemblies going out. both me and my father in law have replaced both sides twice in 46K miles on our trucks and the othe truck one set. All the trucke have 4" Rancho lifts and 305-70-16 tires of different brands.The bearing are National brand that we've been using(National beening a repitable company). Has any body had the same problems or can you refer me to another site to discuss this, Thanks.
#42 of 239 Boxed frames by jasper12 Dec 04, 2007 (4:51 pm)
Any thoughts on what will happen to the new boxed frames that cannot drain well or be readily flushed out, after several years on the heavily salted roads of the Northeast? Replies to this message: bruce48532 (Dec 05, 2007 6:15 am)
#43 of 239 95 Silverado 4X4 Wont Engage by conclutcha Dec 04, 2007 (8:10 pm)
I Changed the Actuator but the 4X4 Wont Luck In. Someone told me that it has another switch but I cant find it Please Help. Replies to this message: bruce48532 (Dec 05, 2007 6:19 am)

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