speedo/anti lock adjustments

Discussion in 'Lifted & Offroad Suspension' started by bob13, Mar 12, 2009.

  1. bob13

    bob13 Epic Member 5+ Years 1000 Posts

    I am going to install new wheels and tires 285/75/17 on my 07 NBS 4x4, should I take it to the dealer to have the speedo and anti-lock brakes systems adjusted. I have seen on the site that people have had some problems with these basic mods. Do I need to worry about this or not. Any help would be great. :neutral:
  2. Jimmiee

    Jimmiee Epic Member 5+ Years 1000 Posts

    Yes you do need to reprogram the speedometer. The reprogram will cover the ABS as the computer uses the VSS input <vehicle speed> for the ABS.
    You can buy an aftermarket re-programmer to do this. There are many available so do some searching here in the archives.
  3. 95CTburb19

    95CTburb19 Epic Member 5+ Years 1000 Posts

    I know when my friends put tires that size on their duramax's they said the brakes felt squishy. I don't know if the reprogram would help with that though...
  4. bob13

    bob13 Epic Member 5+ Years 1000 Posts

    Thanks everyone

    Thanks for the replies. Does anyone know how much the dealer charges.....I cant see buying a programmer for a one time need unless its cheap. I know there is a lot you can do with the programmer but I probably will not have another use for it.
  5. mjalstad

    mjalstad Rockstar 100 Posts

    I buy and sell used Programmers and I bought one last week where the guy had the receipt for going to the dealer that listed 1-reprogram for bigger tires and 2-update computer (which I'm guessing was just because they were reprogramming for the bigger tires anyway and I have no idea why he did this if he had a programmer) and I think the total bill was like $150. Might as well just buy a programmer for that price.

    about your brakes feely squishy comment, it is probably just because they put bigger tires on which will decrease your braking performance.
  6. Pete95Sierra

    Pete95Sierra Epic Member 5+ Years ROTM Winner 1000 Posts

    the bigger tires will affect your breaking cuz of the extra weight. i dont know how they would help that through the computer tho
  7. silveradotrailblazer

    silveradotrailblazer Epic Member 5+ Years ROTM Winner 5000 Posts

    Id go with a aftermarket programmer so you can adjust more than just the speedo/abs.

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