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4 port iso mod white label on 05 gmc 2500hd

Discussion in 'Fisher Engineering Discussion' started by liftedgmc05, Jan 20, 2012.

  1. liftedgmc05

    liftedgmc05 Junior Member
    Messages: 26

    just wondering why this iso mod wont work on my 05 gmc 2500hd, what is it's purpose?? what does it control?
     
  2. Lone136

    Lone136 Senior Member
    Messages: 108

    I have been told and don't know this for sure, but one has to do with the truck having DLR and some trucks don't. I know the one on my Ram want work on CHEVY. I have been told this as I stated.What are the numbers on the bos ISO
     
  3. chevyzrule810

    chevyzrule810 PlowSite.com Addict
    Messages: 1,238

  4. buddymanzpop

    buddymanzpop Senior Member
    Messages: 599

    The white label iso-mod can be used in the pre-daytime running light GM's, the yellow and later green label boxes have an additional relay circut for the DRL's, I have never tried a white label in a DRL equipped GM but I wonder if it would work and just not give you DRL's at the plow lights, You've got nothing to lose by trying it and then let us know what you get.
     
  5. liftedgmc05

    liftedgmc05 Junior Member
    Messages: 26

    thats why i was wondering cause I will have a modified head gear on my plow cause it has 10" of lift so the plow does not come above my headlights so i really dont even need plow lights and i was wondering if that is all the iso module did??? any thoughts on that thanks
     
  6. buddymanzpop

    buddymanzpop Senior Member
    Messages: 599

    I'd like to see the results, you have got nothing to loose, do the install and post the outcome.
     
  7. liftedgmc05

    liftedgmc05 Junior Member
    Messages: 26

    just wanted to let you know that the white label 4 port iso mod works just fine on my truck, not sure if it work if I needed the plow lights but anyways it works