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2017 GMC Sierra 6.2 8 Speed Limiter at 84MPH?????

Tanner Smith
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Tanner Smith Enthusiast

Tanner Smith

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Posted

Hey guys, I have a 2017 GMC Sierra with the 6.2L and the 8 speed .My top speed is only 84 mph. has anyone else seen this on theirs? it used to be 98 but for some reason it stops at 84. May it be transmission electronics messing up? It still has the factory warranty and is getting taken in on the 28th of October, but just curious to see what and why it has happened. It has 47,000 miles on it. Thanks

GrumpyAeroGuy Enthusiast

GrumpyAeroGuy

Posted
Posted

I can't answer your question specifically, but I can offer this up.

I have a 2016 5.3l 8sp.

Not sure where it tops out, but I know I had it past 85 mph briefly more than a few times. 84 seems odd to me, as certain areas of the country have 75mph speed limits on interstates I seem to recall....

Have it checked out.

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  • Like 1
sldhead700 Enthusiast

sldhead700

Posted
Posted

I'm sure mine is still close to that hundred mark.... ( I don't remember exactly where it kicks out at)
I was over 90mph last week with no problems.
2017 6.2 8 speed max tow with 44,000 miles.
Not sure why yours has suddenly changed.....

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sldhead700 Enthusiast

sldhead700

Posted
Posted
I can't answer your question specifically, but I can offer this up.

I have a 2016 5.3l 8sp.

Not sure where it tops out, but I know I had it past 85 mph briefly more than a few times. 84 seems odd to me, as certain areas of the country have 75mph speed limits on interstates I seem to recall....

Have it checked out.

Sent from my LM-G710 using Tapatalk


Yes, there are several that are 75mph west of the Mississippi.
Some are even 80mph....[emoji106]

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  • Like 2
Horacio Enthusiast

Horacio

Posted
Posted

2015 Sierra Denali here with the 8 speed. Mine hits 92, but I once saw pics on here of a driveline that wrapped around itself after hitting 92 mph, so I’m happy to come off the gas pedal once I get the passing out of the way.


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Artelt New Member

Artelt

Posted
Posted

I’ve hit 98 on the speedo, but running 35s my speedo isn’t corrected. GPS said 103mph so [emoji2369] 2017 5.3 8 speed


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M1ck3y Senior Enthusiast

M1ck3y

Posted
Posted (edited)

Isn't there a teen driver mode on these trucks? Maybe its in that mode?

 

Yeah my truck has this feature, I should almost set it up for myself. lol

Edited by M1ck3y
  • Like 1
rav3 Senior Enthusiast

rav3

Posted
Posted (edited)
8 hours ago, M1ck3y said:

Isn't there a teen driver mode on these trucks? Maybe its in that mode?

 

Yeah my truck has this feature, I should almost set it up for myself. lol

Good point M1ck3y.....If teen driver mode is "checked" the truck/car wont go over 85 MPH. I bet that's the issue. Now you'll need to remember your code to UNCHECK it, I think.

 

Here's a video on setting up Teen driver  https://youtu.be/Q4vFEblzklk

Edited by rav3
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sldhead700 Enthusiast

sldhead700

Posted
Posted
Good point M1ck3y.....If teen driver mode is "checked" the truck/car wont go over 85 MPH. I bet that's the issue. Now you'll need to remember your code to UNCHECK it, I think.
That would totally make sense, I would check into that being your problem too!

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sldhead700 Enthusiast

sldhead700

Posted
Posted
Isn't there a teen driver mode on these trucks? Maybe its in that mode?
 
Yeah my truck has this feature, I should almost set it up for myself. lol
I should probably do it for me too, lol

Sent from my Pixel 4 XL using Tapatalk

rav3 Senior Enthusiast

rav3

Posted
Posted
1 minute ago, James ****** said:

it's to keep your driveshaft from flying out

I don't understand your post. What's up the driveshaft?

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