Extractor Posted January 27, 2020 Share Posted January 27, 2020 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??? Quote Link to comment Share on other sites More sharing options...
BigBadSierra Posted January 27, 2020 Share Posted January 27, 2020 All I know if you remove the speed limiter then around 115MPH the driveshafts blow apart. Quote Link to comment Share on other sites More sharing options...
Extractor Posted January 27, 2020 Author Share Posted January 27, 2020 oh my... hope that wasn't first hand experience!!! Quote Link to comment Share on other sites More sharing options...
Booger T Posted January 27, 2020 Share Posted January 27, 2020 Is there any good reason to be going faster than that Quote Link to comment Share on other sites More sharing options...
It's Tim Posted January 27, 2020 Share Posted January 27, 2020 (edited) 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 Quote Link to comment Share on other sites More sharing options...
jz777 Posted January 27, 2020 Share Posted January 27, 2020 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 2 Quote Link to comment Share on other sites More sharing options...
flyingfool Posted January 27, 2020 Share Posted January 27, 2020 (edited) gov speed is based on your drive shaft length, Edited January 27, 2020 by flyingfool Quote Link to comment Share on other sites More sharing options...
flyingfool Posted January 27, 2020 Share Posted January 27, 2020 (edited) 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 Quote Link to comment Share on other sites More sharing options...
Thomcat Posted January 27, 2020 Share Posted January 27, 2020 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. Quote Link to comment Share on other sites More sharing options...
EXSlider400 Posted January 28, 2020 Share Posted January 28, 2020 Somebody needs to make a thread about listing the top speed of each truck. AT4 CC SWB 6.2 20” = 112 Quote Link to comment Share on other sites More sharing options...
OnTheReel Posted January 28, 2020 Share Posted January 28, 2020 There may be exceptions but everything I’ve seen: 18” = 98. 20” = 112. 22” = 106. Quote Link to comment Share on other sites More sharing options...
EXSlider400 Posted January 28, 2020 Share Posted January 28, 2020 (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 January 28, 2020 by EXSlider400 Quote Link to comment Share on other sites More sharing options...
AJMBLAZER Posted January 28, 2020 Share Posted January 28, 2020 Mine kicks on at 106mph. ‘19 Z71 CC short short bed and 18” wheels with Goodyear whatevers. Quote Link to comment Share on other sites More sharing options...
EXSlider400 Posted January 28, 2020 Share Posted January 28, 2020 (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 January 28, 2020 by EXSlider400 Quote Link to comment Share on other sites More sharing options...
MY164X4 Posted January 28, 2020 Share Posted January 28, 2020 2016 SLT Sierra, gov, is 98mph, 5.3L.. 20 in wheels. Sent from my SM-N976V using Tapatalk Quote Link to comment Share on other sites More sharing options...
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