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Silverado & Fullsize Pick-ups The Silverado has been one of the best selling trucks in the US for decades, and is truly proven to be "like a rock".

2014 Chevy Silverado
Platform: Truck, GMT 400, 800, & 900
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Old 09-03-2008, 01:25 PM
Join Date: Sep 2008
Posts: 10
Default Remove 90MPH top speed limitation off of 2008 Silverado

Hello all.

This is my first post on this forum.

I just recently purchased a 2008 Silverado 1500 2WD 1LT ext cab with 5.3L.

I was interested to see if Chevy still limited top speed to 100MPH like my 98 W/T. To my surprise it was 90MPH!!!!!!!!

The truck was still accelerating strong and felt like someone pulled the plug.

My question is HOW do you change that parameter. Do you need a performance chip, do you use HP Tuner software?

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Old 09-15-2008, 09:16 AM
Join Date: Apr 2008
Posts: 53
Default RE: Remove 90MPH top speed limitation off of 2008 Silverado

yes i have an 06 6.0 2500hd mine quit at 98. with my superchip you can adjust it to 115 thats all i wanna do in a truck.
2006 2500hd 6.0
K&n cold air
Throttle body spacer
nelson tuned!
Thunderbolt Duals
17'moto metals on nitto's
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Old 09-15-2008, 08:15 PM
CF Active Member
Join Date: Sep 2008
Location: LAke Charles, LA
Posts: 221
Default RE: Remove 90MPH top speed limitation off of 2008 Silverado

my bullydog goes to 135
2000 5.3 extended cab, Aem Brute Force Intake, Throttle body spacer, Flexalite Electric fans,EFI Live Tune, 07 Tahoe Factory 20" wheels
1989 GMC 5.7 single cab, soon to be 383, bagged lots of body mods in pieces right now
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Old 09-16-2008, 08:40 AM
Super Moderator
Join Date: May 2008
Posts: 2,386
Default RE: Remove 90MPH top speed limitation off of 2008 Silverado

With a high axle ratio like 410 or 456, the manufacturer is probably just trying to protect the drivetrain. Assuming you have a 373 or a 342, and you're not redlining your tach, what's the practical purpose of making a pickup truck go over 100MPH? Is there an Autobahn in the US somewheres which I don't know about?

Many jurisdictions add a reckless endangerment or reckless driving summons to your speeding ticket at those velocities, so beware. Word to the wise, radar detectors ain't foolproof protection.

WetBlanket2008, out.
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Old 09-16-2008, 05:02 PM
Join Date: Sep 2008
Posts: 5
Default RE: Remove 90MPH top speed limitation off of 2008 Silverado

Edge will allow you up to 200mph...of course you will never see that

I know mine will pull like hell to 100mph, then it just seems to crawl after that....
Of course ive got a 2" lift, and 4wd and some goodies....

Sure does make mustangs mad, thats all ive got to say about that.[sm=lildevil.gif]

Edge has a great staff, and you can usually find someone selling them a lot cheaper than new. I like the dash mount to keep track of stuff and the updates are easy.
On the flip side..... it lacks in some areas. You cant adjust for just one thing, like fuel pressure or maping..... it has settings. And a small area for tire size, top speed and acouple other things.
Diablo does alot more..... Im just looking for the same deal I got on the Edge before I buy one.

Of course a custom tune would do more for ya than a handheld programer.
07 z71 4x4 RCSB 2" Level Lift/Edge Programer/Hooker Aerochamber dumped/ K&N CAI
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Old 09-16-2008, 05:02 PM

08, 2000, 2008, change, chevy, disable, limit, limiter, remove, road, silverado, silverdo, speed, throttle, top

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