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last model year able to use 2 plug harness on GM trk

Discussion in 'Fisher Engineering Discussion' started by NHresident, Nov 17, 2009.

  1. NHresident

    NHresident Senior Member
    Messages: 304

    What was the last year a 2 plug harness could be used on a GM truck Thanks
  2. M&M

    M&M Senior Member
    Messages: 312

    I'm pretty sure they went from 2 plug to 3 plug and now they are all back to 2 plug and any set up can be used with the proper truck side wiring harness.
  3. Arc Burn

    Arc Burn PlowSite.com Addict
    Messages: 1,141

    02' on Chevy/GMC,the new 2 plug setups mentioned are MultiPlexed and completely different.
  4. Snow Miser

    Snow Miser Senior Member
    Messages: 104

    2002 is the last year you can use the two plug set up for wiring up with relays instead of the isolation module. To correct M&M, All the new straight blade plows use the 3 plug set up while the extreme v plows and XLS plows use the two plug with a multi-plex plow module.
  5. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    Actually you can run a 2 plug on an '03-up classic body if it's a 12 pin.
  6. M&M

    M&M Senior Member
    Messages: 312

    So much to learn...