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06 chevy silverado canít go above 85 mph

Printed From: the12volt.com
Forum Name: General Discussion
Forum Discription: General Mobile Electronics Questions and Answers
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=80311
Printed Date: November†28, 2021 at 8:59 PM


Topic: 06 chevy silverado canít go above 85 mph

Posted By: geesssare
Subject: 06 chevy silverado canít go above 85 mph
Date Posted: July†14, 2006 at 11:06 PM

I took my truck to a local dragstrip just to see what it could do. To my suprise the truck would not go past 85 mph. I was curious to know if anyone knew why and if there is any way to disable it or modify it



Replies:

Posted By: Velocity Motors
Date Posted: July†15, 2006 at 8:33 AM

Do you have the 4.8 L ? If so you can get a power programmer for this vehicle that will :

  • Adjust Shift Points
  • Adjust Shift Firmness
  • *Eliminate Speed Limiter*
  • Recalibrate Speedometer for Larger Tire Sizes
  • Recalibrate Speedometer for Gear Changes
  • Adjust Rev Limits
  • Adjust Cooling Fans
  • Choose from three available Performance Settings
  • We sell these all day long up here and the customer have positive things to say about them. Most of the guys up here love the diesel programmers that give them an extra 100+ horses to their trucks.




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    Jeff
    Velocity Custom Home Theater
    Mobile Audio/Video Specialist
    Morden, Manitoba CANADA




    Posted By: geesssare
    Date Posted: July†15, 2006 at 1:44 PM
    I have the 5.3L. how much is the programmer? and do you need a laptop to adjust the PCM?




    Posted By: adrianspeeder
    Date Posted: August†01, 2006 at 11:27 AM
    Cheap trick is to turn your key to start. Knocks out the computer out of the loop and as long as the clutch isn't pushed/shifted to P or N it won't crank.

    Adrianspeeder

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    '02 F250 PSD, '97 F-150, '71 F-100, '66 F-250, '93, '92, '88, '84 Broncos

    Penn State electrical engineerin' major




    Posted By: xtremej
    Date Posted: August†01, 2006 at 12:08 PM
    The power programmer is 349.99 retail plus ship, it is the same for 4.8,5.3 and 6.0. You can also get a superchips programmer to do the same. And in reality there are many more programmers out there but these 2 sell and installed nearly a hundred. They just plug into your diagnostic port bottom of the dash. You go through and select the options you want and then it will upload into the vehicle computer. Just make sure to program it back to stock if you have any service work or if the dealer hooks there computer to it and flashes it you'll chance damaging it $$$$.

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    Posted By: oscarnl86
    Date Posted: August†15, 2006 at 10:39 PM
    like nousername says there might be something else like tire size afecting it and i know that for a fact. i have  a 03 silverado with the 4.8 and before it will shut off at 99 and it still does but it takes it a wile to get up there. the reason is that i have oversise rims (22") posted_image

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    i know some stuff and what i dont know ill make it up feel free to ask




    Posted By: TruckSystem
    Date Posted: August†20, 2006 at 10:05 PM
    99 mph is the stock setting for newer Chevy trucks to stop accelerating, the cheapist way to remove this without having a laptop and the programs to do it yourself is to get a mail order tune from www.wait4me.com, which runs about 150 bucks, or 75 if you send them your original PCM.

    -------------
    2003 Chevrolet Silverado Standard Cab ~ Alpine CDA-9851
    Diamond Audio D3600.1 ~ 2x Diamond Audio TM310D4
    Diamond Audio D3400.4 ~ Diamond Audio Hex S600s
    AstroStart RS5204 Remote Start/Alarm




    Posted By: geesssare
    Date Posted: October†20, 2006 at 6:51 PM
    TruckSystem wrote:

    99 mph is the stock setting for newer Chevy trucks to stop accelerating, the cheapist way to remove this without having a laptop and the programs to do it yourself is to get a mail order tune from www.wait4me.com, which runs about 150 bucks, or 75 if you send them your original PCM.


    I just got my laptop 2 weeks ago!! Would it be possible to write a program or is there a standard program that you use?




    Posted By: auex
    Date Posted: October†20, 2006 at 7:03 PM
    Have to love speed limiters. Goes to show that you should get manual transmissions, hehehe. I know the computer can still limit the engine even with manual.

    -------------
    Certified Security Specialist
    Always check info with a digital multimeter.
    I promise to be good.
    Tell Darwin I sent you.

    I've been sick lately, sorry I won't be on much.




    Posted By: geesssare
    Date Posted: October†20, 2006 at 7:07 PM
    How does the comp limit the speed? By cutting fuel, or does it have to do with the VSS?




    Posted By: auex
    Date Posted: October†20, 2006 at 7:21 PM
    The ecu has speed sense going to it and since it controls the fuel it can change the rate the injectors pulse.

    -------------
    Certified Security Specialist
    Always check info with a digital multimeter.
    I promise to be good.
    Tell Darwin I sent you.

    I've been sick lately, sorry I won't be on much.





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