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Thread: I have questions about some add ons for my '03 sierra 5.3l

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  1. #1
    Join Date
    May 2009
    Location
    Wichita Falls, TX
    Posts
    883

    I have questions about some add ons for my '03 sierra 5.3l

    I am wondering what I should add next? I was thinking about a bigger throttle body, or injectors? I have no tune yet and I hear NELSON is the best. Any help would be appreciated.

  2. #2
    Join Date
    May 2008
    Location
    Schertz, Tx
    Posts
    2,539
    You won't be disappointed with a Nelson tune!

    07 Z71 4x4, 6.0L, 3.73s, Turbonetics T76 @ 10 psi, 75 shot, Snow meth kit, PLX DM-100 wideband gauge, Nelson tune, Comp 212/216 .557/.561 114 lsa, 60# injectors, Yank 3000, 4L80E , Magnaflow - dumped, e-cutout
    Line-X, Pace Edwards Full Metal Jackrabbit bedcover

  3. #3
    Join Date
    May 2009
    Location
    Wichita Falls, TX
    Posts
    883
    I hear his tunes are around the same price as those plug and play ones. But 100 times better.

  4. #4
    Join Date
    Apr 2008
    Location
    newburgh, NY
    Posts
    512
    They are, do a tune before anything else.
    Step 1. crus at it.
    Step 2. get a hammer.
    Step 3. torch it.

  5. #5
    Join Date
    Aug 2008
    Location
    North Texas
    Posts
    12,078
    Yes, it's probably the most important early mod.

  6. #6
    Tune for sure.
    99RCSB Broke because I wasted thousands and thousands of dollars on my truck.

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