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


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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

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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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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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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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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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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

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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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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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