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  • 4x4 actuator

    I have had problems with the 4x4 actuator on my 1998 SIlverado. During very cold wheather conditions, the 4x4 will not kick in. The 4wd electronic indicator light flashes x3 times then stays in 2wd. After a couple of miles, and repeated tries to lock in 4wd, the 4wd finally goes in. My mechanic has told me that the actuator needed replacing. I had the electronic one replaced for a mechanical one, but it still does it in cold weather. Anybody else have anything similar or any ideas what to do next.

  • #2
    Re: 4x4 actuator

    I have the same trouble with my 1988 k1500 but mine will not engage at all.
    I've looked into installing a kit from 4x4 posi-lok it is a manual kit. They tell me that the system that are trucks use is a thermal actuator and they sometime don't work in the cold!!!!!!

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    • #3
      Re: 4x4 actuator

      Cold weather shouldn't affect the 98 as all should have the later type actuator. The 88 needs the thermal one taken out and thrown as far away as possiable and then upgraded to the later type. Both of you need to check the electrical connection at the actuator. They can get salt etc. in them and corrode, reducing their performance.
      Diamond Jim
      98 Burb, 5.7L, 2500LS, 4X4; 80 GMC 383, ½, Long bed; 74 Dually Flatbed 350; 73 Short bed 350 4X4; 41 Chevy Master Deluxe, 327/375hp Rochester FI; 89 Fleetwood Bounder, 2 ton Chevy Chassis, 454/TH425

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      • #4
        Re: 4x4 actuator

        thanks for the tips guys...

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        • #5
          Re: 4x4 actuator

          this is a common problem for the OBS trucks with 4x4...i think there was a recall on it..u might want to check that out... but yes, its a common problem...

          Aj
          1996 Burban: workhorse
          1998 C5 Vette: 9sec toy
          2007 MB E63 AMG: daily
          2005 Infiniti FX35: wifey daily
          2005 Maserati GranSport: wifey toy
          2006 Suzuki GSXR 1000: 9sec toy

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          • #6
            Re: 4x4 actuator

            :word:
            Originally posted by Diamond Jim
            Cold weather shouldn't affect the 98 as all should have the later type actuator. The 88 needs the thermal one taken out and thrown as far away as possiable and then upgraded to the later type. Both of you need to check the electrical connection at the actuator. They can get salt etc. in them and corrode, reducing their performance.

            GARAGE:
            03 Yukon
            02 Tahoe "HDHOE"
            09 Malibu
            00 Impala
            94 Z71
            55 Chevy Stepside

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            • #7
              Re: 4x4 actuator

              i have had no problems with mine on a 99 sub

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              • #8
                Re: 4x4 actuator

                Originally posted by blue99burban
                i have had no problems with mine on a 99 sub

                Isn't that precious?

                (As you can tell I am watching re-runs of SNL on cable this morning)
                Diamond Jim
                98 Burb, 5.7L, 2500LS, 4X4; 80 GMC 383, ½, Long bed; 74 Dually Flatbed 350; 73 Short bed 350 4X4; 41 Chevy Master Deluxe, 327/375hp Rochester FI; 89 Fleetwood Bounder, 2 ton Chevy Chassis, 454/TH425

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