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  1. #1

    Default Diablo Predator Question

    Just got my Diablo programmer in today. I'm planning on hooking it up tomorrow and testing it out. However, reading the little booklet that came with it it says that it recommends to pull a few fuses before pulging it in. I don't remember what they all were, radio was one I believe. Is this really necessary? Sounds like a hassle more than anything, but I mean if it could actually mess some thing up then I'll pull em out. What are some of the opinions of the Diablo users out there?

    2004 Silverado 2500 "Judas"
    Crew Cab and Short Bed
    6.0L Vortec
    Diablo Predator
    True Dual Exhaust: Hooker MaxFlow Mufflers and X-Pipe
    Drop-In K&N Air Filter
    Alpine Stereo System: iDA-x303 Deck, SPS-600 Front and Rear Speakers, KTP-445 Amplifier

    Future Upgrades Include:
    Cosmetic/Other: Spray-In Bed Liner, HID head lights, Leveling Kit
    Performance: Underdrive Pulleys

  2. #2


    There's a good reason why you are instructed to remove fuses. The programmer is not smart enough to deal with those circuits. Leaving the fuses in will cause false codes to set during programming. Do yourself a favor and follow the instructions. The first question the Diablo help line will ask you is which fuses did you remove.

    2004 SILVERADO 2500HD LS
    Pro Comp Leveling Kit
    285-75-16 Cooper ST All Terrains
    Pro Comp Programmer
    Bilstein Shocks
    Linux Bed Liner
    Tinted Windows

    Other rides:

    1967 Landcruiser <350 Chevy>
    1970 Camaro
    1990 Geo Metro Convertible
    2007 FJ Cruiser

  3. #3


    Understandable. After reading your reply i went straight out and installed the 87 octane tune since I just got a full tank yesterday of 87 octane. I'll see how it does throughout the day and stuff. Next fill up I'll try out the performance tune. Looking forward to using it!

  4. #4


    Keep us posted on the results.

  5. #5


    Yeah please do post your results. Im thinking of getting a diablo programmer and i'm curious of your MPG and power gains
    2000 Chevy Silverado 1500 5.3L Z71 - 4x4

  6. #6


    Well so far today I've drove about 50 to 60 miles and reset the Average Economy reading on my truck (before I started it and was still in the drive way). I was getting about 12.1 MPG city and right now I'm at 13.3 MPG city. We will see over the next few days if that continues to rise or lower however.

    The improvement in shifting firmness was very nice! The truck definitely has some more get up and go when I lay into it, even at high speeds. And I noticed right away the changed infamous 1-2 shift that everyone talks about. Definitely much nicer and useful shift now lol.

    I will keep yall posted as the week progresses. Tomorrow I will be leaving for a 110 mile highway trip so I will have to let yall know the results from that when I get back on Friday.

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