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Limited speed?

6TEEN5.3

By 6TEEN5.3
in Engines & Drivetrain

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6TEEN5.3 Enthusiast

6TEEN5.3

Posted
Posted

So I was driving my truck the other night and decided to get on it. It went all the way to 107mph before I let off. Aren't they supposed to be limited to around 99mph? It's a 2017 Silverado 1500 4x4 CC SB 5.3 with 33s and a leveling kit. The engine is completely stock. Maybe the speedo is off because of the tires?

LongrangeLauber Senior Enthusiast

LongrangeLauber

Posted
Posted

If you never recalibrated it then yeah you're most likely right. Same setup on my truck but recalibrated and it limits out around 97 or so. I figured at 107 it should have been getting close though

SirenRed16 Senior Enthusiast

SirenRed16

Posted
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My dad's 2017 Silverado CCSB 5.3 cuts out at 99. My '16 Silverado RCSB 5.3 cuts out at 107. Both only have lowering rear shackles.

MattM2485 Enthusiast

MattM2485

Posted
Posted

I have a 17 RCSB silverado with stock tires and it went all the way to 110 on the speedo and never cut out but I let off. Ill have to see when it actually cuts out.

6TEEN5.3 Enthusiast

6TEEN5.3

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I'm gonna throw it on the dyno and see what it can do. I don't want to do 110+ on public roads

Colossus Senior Enthusiast

Colossus

Posted
Posted

Looks like GM has raised the limiter a bit. It was 98 for everything up to 2014? What are the speed rating of the tires on the 2016s when they come from the factory that are able to do 112? GM often sets the speed limiter based upon the speed rating of the tires it comes from the factory with.

Sierra706 Senior Enthusiast

Sierra706

Posted
Posted

Looks like GM has raised the limiter a bit. It was 98 for everything up to 2014? What are the speed rating of the tires on the 2016s when they come from the factory that are able to do 112? GM often sets the speed limiter based upon the speed rating of the tires it comes from the factory with.

I had the 22s with Bridgestone dueler rhs if that makes any difference.

 

 

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  • 2 weeks later...
muddkatt Senior Enthusiast

muddkatt

Posted
Posted

98 MPH on both the 01 Sierra and the 15 Silverado LTZ.

L86 All Terrain Senior Enthusiast

L86 All Terrain

Posted
Posted

15 6.2 factory 20's, I get 98mph. I heard the reason for the lower speed rating was due to critical driveshaft speed. Do you guys with the higher limiter have the 3.08 final drive?

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