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Thread: PCM Questions

  1. #1
    Join Date
    Jul 2008
    Location
    Grand Rapids
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    38

    PCM Questions

    I don't know much about PCM tunes. How does the Nelson tune work?. I would like to keep my pcm so I can allways go back to stock. Its a daily driver so I want it to be reliable. What kinda horsepower gain do you get with a 87-89 octane tune?
    04' silver,RCSB,volant intake,jba catback, 2" shackle kit,vette servos,

  2. #2
    Join Date
    Feb 2007
    Location
    Spring, Texas
    Posts
    1,739
    Nelson tunes don't allow you to keep your stock PCM. However, with that being said here is how it works:

    -Fill out the online form that says what mods you've done to your truck and what you are going for (performance, fuel economy...).
    -Someone will call you to confirm your order
    -Nelson sends you a tuned PCM that you replace your stock one with
    -Send stock PCM, "core", back to Nelson

    This way your truck is never down while you are waiting on your PCM. Anytime you want to return the truck to stock, just call/email Nelson and tell them to send you a stock tune. You get lifetime retunes with Nelson so that all you have to pay is shipping of the PCM's. Pretty good deal if you ask me.

    As far as gains, you won't be disappointed. I would go with the 91-93 octane tune and you could see 25+ in gains. It will be reliable no matter which one you choose.

    2004 Silverado Crew Cab, forged iron 5.7, STS w/MP turbo, 10+ psi, FMIC, Tial 50mm BOV, Vic Jr, Snow performance meth, MTI Stealth cam .220/.220 .581/.581 115lsa, Comp chromoly pushrods, Yank TT3000 stall, LS1 Efans, 160 tstat, Trucool 40k trans cooler, 60# injectors, Walbro fuel pump, Patriot springs, Built 4l65E w/billet input & output shafts, Eaton posi, SD tuned...all installed by Klein North Automotive

  3. #3
    Join Date
    Jul 2008
    Location
    Grand Rapids
    Posts
    38
    OK sounds good. Do you just plug it in and play? What is nice safe reliable tune? How much TM to be taken off?
    04' silver,RCSB,volant intake,jba catback, 2" shackle kit,vette servos,

  4. #4
    Join Date
    Jun 2008
    Location
    at my house
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    65
    Quote Originally Posted by web7433 View Post
    I don't know much about PCM tunes. How does the Nelson tune work?. I would like to keep my pcm so I can allways go back to stock. Its a daily driver so I want it to be reliable. What kinda horsepower gain do you get with a 87-89 octane tune?
    If a person wanted to keep his stock PCM, I believe he-she could make a trip to the salvage yard and get a core. I may be wrong though.


    2003 Silverado RCSB
    LQ9 6.0l, PS longtube, CAI, E-Fans and a custom tune via hptuners

  5. #5
    Join Date
    Nov 2003
    Location
    Denton Texas
    Posts
    20,540
    They will sell you a core if its a year model they have available. Ask Melissa for pricing for your year model.
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

  6. #6
    Join Date
    Mar 2003
    Location
    San Antonio, TX
    Posts
    11,038
    ya, we will, the core is $55.

  7. #7
    Join Date
    Feb 2007
    Location
    Spring, Texas
    Posts
    1,739
    Quote Originally Posted by web7433 View Post
    OK sounds good. Do you just plug it in and play? What is nice safe reliable tune? How much TM to be taken off?
    You remove your stock PCM (located on the driver's side next to the battery) and plug in your tuned PCM. So, yep, just re-connect and go. Nelson will send you a safe and reliable tune. It will remove TM, adjust timing, shift points... They have tuned 100's (if not 1000's) of vehicles from mild to extreme mod's. A wise decision to get your truck tuned by them.

    2004 Silverado Crew Cab, forged iron 5.7, STS w/MP turbo, 10+ psi, FMIC, Tial 50mm BOV, Vic Jr, Snow performance meth, MTI Stealth cam .220/.220 .581/.581 115lsa, Comp chromoly pushrods, Yank TT3000 stall, LS1 Efans, 160 tstat, Trucool 40k trans cooler, 60# injectors, Walbro fuel pump, Patriot springs, Built 4l65E w/billet input & output shafts, Eaton posi, SD tuned...all installed by Klein North Automotive

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