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Posted

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???

Posted

Is there any good reason to be going faster than that?

Posted

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

  • Like 2
Posted (edited)
34 minutes ago, It's Tim said:

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 by flyingfool
Posted
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.

Posted

There may be exceptions but everything I’ve seen:

 

18” = 98.

20” = 112.

22” = 106.

 

Posted (edited)
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 by EXSlider400
Posted (edited)
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 by EXSlider400
Posted

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

 

20 in wheels.

 

Sent from my SM-N976V using Tapatalk

 

 

 

0c4072058a75635867ac672f4bd06b4c.jpg

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