Question about 2004 GMC Sierra 1500 Crew Cab

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Service 4 wheel drive on info center

The service 4wheel drive comes on while driveing. It dosen't happen all the time. I can drive for days or months without it comming on.Sometimes when it happens the 4 wheel drive slector will not light up but the truck will stay drivable just only in 2 wheel drive. I also have heared a click soun when going from reverse to drive. This also dose nothappen all the time

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  • wesley77 Jul 09, 2008

    i am having the same problem with my 2005 sierra.

    SERVICE 4X4.

    this only happens periodicly mostly when i drive it for over 30k

    in the winter i putt it on auto and it wouldnt come out of 4x till i turned the truck off and restarted it. and this was the first time i saw the warning..

    i tock it to the dealer and they couldnt find the problem it wouldnt act up for them . **** next day i saw the warning again..some times the little light on the switch doesent come on and if i putt it on auto it will blink ?/?..im taking it in next week again **** im not confedent they will find the problem... hope we can get this figured out ...

  • Anonymous Aug 08, 2008

    I have the same Service 4 wheel Drive message coming on, but don't see any driveability issues.

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I had the same problem with my 03 silverado.it's a internal problem in the 4WD actuator.my truck would go in 4WD sometimes and some other times the service 4WD light would come on and it would not got in..after a while it wouldn't go in at all so i replaced the actuator and it fixed the problem..

Posted on Dec 31, 2008

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2005 z71 Silverado v-8 4X4 not working.
Case History 07 09 13
Problem started with service 4wDrive message. It would come and go. Got worse as time went on. Then it got to All switch lights would only come on 3 seconds when key turned on and again when started for 3 seconds. Then no 4X4 and no lights. Researched on internet and noted problem was often solver by replacing control switch due to bad solder joints. Ordered new switch. Changed out with no change. Replaced old switch.
Went to AutoZone and checked codes. Had 4 codes B2725, B0790 (both Cleared) and Codes C0327 & C0040 (Both would not clear)
Next I decided before taking to the shop to try cleaning the contacts although I thought I was probably wasting my time. Went to radio shack and bought electronic contact cleaner spray.($9.98). Pulled 30 amp fuse under hood and raised vehicle. Disconnected plug on transfer case and sprayed contacts on both plugs(male & female). Thoroughly dried with compressed air and plugged back in. Just knew this wasn't going to fix it. Also sprayed both plugs on both sides of transfer case(Rear) (2 speed sensors I think). Anyway to make a long story short started up truck and all was normal:o) Every thing work fine and all lights and all modes work correctly. Hope you have this easy of fix to cure your 4X4 problem. kcar11705@yahoo.com

Posted on Jul 11, 2013

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owners manual mite help, service manual, going on line,

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