Speed limited to ....????

[Extractor]

I'm going to start a new thread regarding governors on our trucks. 

 

I have a 2020 AT4 Carbonpro 6.2L that startled me Friday by flashing a warning that speed limited to 98 and shut the truck down, obviously until I got below 98.

 

Some other owners are stating 106, but they seem to be Denali owners.  My friend has a 19 AT4 that he's had over 105 without hitting the wall.

 

Can this be adjusted or what's going on here???

[BigBadSierra]

All I know if you remove the speed limiter then around 115MPH the driveshafts blow apart.

[Extractor]

oh my... hope that wasn't first hand experience!!!

[Booger T]

Is there any good reason to be going faster than that

[It's Tim]

20 minutes ago, Booger T said:

Is there any good reason to be going faster than that

Better news story.

 

I'm sure there are many more:

https://www.nbclosangeles.com/news/riverside-county-temecula-dui-15-freeway-crash/80685/

Edited January 27, 2020 by It's Tim

[jz777]

I believe the limited speed has more to do with what tires the truck is outfitted with from the factory.

 

All tires have a speed rating, and you cannot exceed it without risking tire failure.

 

Here’s a link with a listing of speed ratings... https://www.tireamerica.com/resource/tire-speed-ratings

[flyingfool]

gov speed is based on your drive shaft length, 

Edited January 27, 2020 by flyingfool

[flyingfool]

34 minutes ago, It's Tim said:

Better news story.

 

I'm sure there are many more:

https://www.nbclosangeles.com/news/riverside-county-temecula-dui-15-freeway-crash/80685/

looks like somone might have hacked his obd port and put the truck into a full throttle situation.. another reason to lock down your OBD2 port and disconnect all sat and cell data interfaces into the truck. our trucks have no security

Edited January 27, 2020 by flyingfool

[Thomcat]

3 hours ago, Extractor said:

I'm going to start a new thread regarding governors on our trucks. 

 

I have a 2020 AT4 Carbonpro 6.2L that startled me Friday by flashing a warning that speed limited to 98 and shut the truck down, obviously until I got below 98.

 

Some other owners are stating 106, but they seem to be Denali owners.  My friend has a 19 AT4 that he's had over 105 without hitting the wall.

 

Can this be adjusted or what's going on here???

Safety concerns result in ignition cutout limiter speed based upon stock tires. Upscale tires on the upper level Silverados and GMCs safely permit higher speeds.

[EXSlider400]

Somebody needs to make a thread about listing the top speed of each truck. 
 

AT4 CC SWB 6.2 20” = 112

[OnTheReel]

There may be exceptions but everything I’ve seen:

 

18” = 98.

20” = 112.

22” = 106.

 

[EXSlider400]

7 minutes ago, OnTheReel said:

There may be exceptions but everything I’ve seen:

 

18” = 98.

20” = 112.

22” = 106.

 

I agree with the above.  Here’s a video of the exact same truck I have except for the 18 inch rims. 
 

Here’s a Denali with 22”

 

Edited January 28, 2020 by EXSlider400

[AJMBLAZER]

Mine kicks on at 106mph. 
 

‘19 Z71 CC short short bed and 18” wheels with Goodyear whatevers. 

[EXSlider400]

3 minutes ago, AJMBLAZER said:

Mine kicks on at 106mph. 
 

‘19 Z71 CC short short bed and 18” wheels with Goodyear whatevers. 

Well crap... Well since that doesn’t match the formula I’m out...

Edited January 28, 2020 by EXSlider400

[MY164X4]

2016 SLT Sierra, gov, is 98mph, 5.3L..

 

20 in wheels.

 

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