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Thread: Obs

  1. #1
    Tuner in Training
    Join Date
    Mar 2018
    Posts
    19

    Obs

    Why isn?t there any support for the obs 96-99

  2. #2
    Tuning Addict 5FDP's Avatar
    Join Date
    May 2012
    Location
    Rogers, MN
    Posts
    13,533
    Those trucks are supported, but it looks like not all those years per what the website says.

    You can tune 98-00 OBS body style trucks.

    Maybe the 96-97 use an unsupported computer.

    https://www.hptuners.com/vehicles/
    2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.

    If you don't post your tune and logs when you have questions you aren't helping yourself.

  3. #3
    Advanced Tuner
    Join Date
    Feb 2016
    Location
    Texas
    Posts
    534
    5FDP is correct there are slight variances in the black box. from 96-97 and 98-2000 even with support to the 98-2000 the black box is still very limited. Some without the ability to fail the maf. Obviously physically unplugging the 3 wire mass air is the ticket here. I highly suggest the 411 swap to anyone interested in gaining tuning access to their obs.
    97 ext cab short bed silverado 5.7 411 swap, edelbrock 29135 intake, lightly ported 906 heads milled .035 thou. factory press in rocker studs & rockers, comp 787 retainers & stock locks, ls6 springs. Comp cams 08-503-8 T56 swap

    86 SWB crate vortec 5.7/th350 The wife's truck

  4. #4
    Potential Tuner
    Join Date
    May 2020
    Posts
    6
    So i have a 96 k1500 and a 98. What is involved in doing a 411 swap? The 96 is a manual trans and the 98 is a parts truck auto

  5. #5
    Potential Tuner
    Join Date
    May 2020
    Posts
    6
    And o would prefer speed density over maf in it. I use it to pull trailer and work but i do like to do a little 4wheeling and maf dont like mudholes lol.

  6. #6
    Advanced Tuner
    Join Date
    Feb 2016
    Location
    Texas
    Posts
    534
    Contact lextech on gmfullsize.com email him your truck info. if you dont have or cant find his information. PM me and I can help get you his info.
    97 ext cab short bed silverado 5.7 411 swap, edelbrock 29135 intake, lightly ported 906 heads milled .035 thou. factory press in rocker studs & rockers, comp 787 retainers & stock locks, ls6 springs. Comp cams 08-503-8 T56 swap

    86 SWB crate vortec 5.7/th350 The wife's truck