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  1. #1

    Default 4wd Hi not engaging

    (first time poster)

    2004 Silverado 1500 Z-71
    5.3 engine, automatic. 2wd/4wd selector is on the floor (not push button)

    My truck is not engaging when I select 4-HI. 2wd, Neutral, and 4-LO work correctly. Any thoughts?

    Thanks for your input.
    Last edited by tdjaster; 11-20-2011 at 02:14 PM.

  2. #2
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    Default

    Hey, my thoughts: could be possibly corroded wires or in the connection to the 4x4 module
    -when you turn on your 4X4-if engage the 4x4, if you a sound like a CLICK-CLICK" noise that is your problem
    -It could also be the actuator; if there is no noise, it could be that.

    that's all i could think of.. good luck



    2008 GMC ENVOY SLT
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  3. #3
    Jr. Engineer Megasaurus's Avatar
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    Lots of posts on this site regarding that issue - but because you can not search for 3-letter words on here you have to go to google and search "gmtruckclub.com 4hi stuck" and you will get a bunch of posts about it.

    http://www.gmtruckclub.com/forum/showthread.php/77089-4-Wheel-Drive-stuck

    http://www.gmtruckclub.com/forum/showthread.php/62679-2002-avalanch-stuck-in-4-hi


    Clint
    Rockwall, Texas


    2008 Suburban 4WD BEAST! plus a couple of other Chevy rides!

  4. #4

    Default

    Welcome to the club. Also check the bushings on the shift linkage, when they get worn they won't shift correctly.
    :cool:

    2005 Chevy Silverado Z71 Crew Cab
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    :glasses:

  5. #5

    Default

    Thanks for the help. Can you be a little more specific? I'm a tinkerer/explorer when it comes to working on my truck. I'm certainly not at the mechanic level.

    Quote Originally Posted by silveradotrailblazer View Post
    Welcome to the club. Also check the bushings on the shift linkage, when they get worn they won't shift correctly.

  6. #6
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    If you go and search 4x4 issues in the forums, there are tons of people that post instructions, advice etc... that is just an idea too..



    2008 GMC ENVOY SLT
    GT RACERS Black Diamond Grille
    | PIAA Headlights| BEAMERS Pro HID Kit 6,000K Diamond White |
    3" LiftMeister Body Lift Kit
    |Skyjacker Suspension| MagnaFlow Exhaust w/tip |Hella Supertone Horns| Blacked out Body


    "Silly Boys! Lifted Trucks are for Girls"
    "If you can't beat 'em, then your going to slow" :sign0081:

  7. #7

    Default

    Check the wiring at the actuator on ur front diff
    Redneck Rucker

  8. #8

    Default

    SOLVED!!

    It was not the actuator (because that would have knocked out all 4wd, not just the 4HI). I was told by Advance Auto Parts that it would most certainly be a wiring issue. So I followed the wiring from the shift selector in the truck down to where it enters the transfer case. The plug that connects the wiring harness to the case is what was faulty (I'm blanking on what the name of the part is called).

    I got a new one from the Chevy dealership (because it is a part only available at dealerships) for about $50. It took me a while to work the old one out but was only a matter of minutes to put the new one back in.

  9. #9
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    Hey! Glad that things worked out for you...

    ---------- Post added at 08:47 PM ---------- Previous post was at 08:45 PM ----------

    I predicted wires!! YEA! I am glad that it wasn't the actuator... Now you can drive without worrying about it



    2008 GMC ENVOY SLT
    GT RACERS Black Diamond Grille
    | PIAA Headlights| BEAMERS Pro HID Kit 6,000K Diamond White |
    3" LiftMeister Body Lift Kit
    |Skyjacker Suspension| MagnaFlow Exhaust w/tip |Hella Supertone Horns| Blacked out Body


    "Silly Boys! Lifted Trucks are for Girls"
    "If you can't beat 'em, then your going to slow" :sign0081:

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