Jump to content

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

Tanner Smith
 Share

Recommended Posts

Tanner Smith Enthusiast

Tanner Smith

Posted
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.

Sent from my LM-G710 using Tapatalk

  • 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.....

Sent from my Pixel 4 XL using Tapatalk

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]

Sent from my Pixel 4 XL using Tapatalk

  • 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.


Sent from my iPhone using Tapatalk

  • Like 2
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


Sent from my iPhone using Tapatalk

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
  • Like 1
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!

Sent from my Pixel 4 XL using Tapatalk

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?

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Recently Browsing   0 members

    • No registered users viewing this page.

  • Forum Statistics

    250.4k
    Total Topics
    2.7m
    Total Posts

  • Member Statistics

    342,760
    Total Members
    8,960
    Most Online
    MASONV88888888
    Newest Member
    MASONV88888888
    Joined

  • Who's Online   0 Members, 0 Anonymous, 1,562 Guests (See full list)

    • There are no registered users currently online

  • Latest Articles

  • Posts

    • Coastie05
      Replacing 2.7L on 2021 Silverado with 2023 2.7L

      By Coastie05 · Posted

      I’m definitely interested to hear the end result here. 
    • MASONV88888888
      Another 6.2L engine failure!

      By MASONV88888888 · Posted

      My 2025 Silverado 1500 had to receive a brand-new engine (long block) under warranty last month at only around 16,500 miles. Before the replacement, the truck repeatedly displayed "Engine Oil Level Low" warnings, even though the Oil Life Monitor still showed around 50% remaining after about 6,000 miles since my last oil change. After seeing the warning several times, I checked the dipstick with the engine cold, and the oil level was completely normal. The next day, the message escalated to "Add Engine Oil." At first, I assumed it was just a faulty oil level sensor, so I brought the truck to the dealership. After inspecting the engine, they found internal cylinder wall scoring and ultimately replaced the entire long block under warranty. Before this happened, I was planning to install a 4-inch lift and suspension upgrade on my truck. After needing a new engine at just 16,500 miles, I honestly don't see the point anymore. I also contacted GM to ask whether my vehicle qualified for a buyback, but I was informed that it does not at this time. Anyway, this experience has left me with serious concerns about the long-term reliability of this engine. I sincerely hope NHTSA expands the current investigation or recall to include 2025 model and performs a thorough inspection of affected vehicles. My biggest concern is that these engines may fail shortly after the powertrain warranty expires. If GM truly stands behind this engine, then at the very least, please consider extending the powertrain warranty to 10 years for affected owners. That would go a long way toward restoring customer confidence.
    • Grumpy Bear
      OCI, not when but why?

      By Grumpy Bear · Posted

      Without exception but then I'm the odd duck, right? I know what goes into that test, how it is calculated and thus how to beat it. But EPA values are often not beaten by the general public and the government has in past years adjusted the means and methods to come to those values to more closely approximate "Joe Average".    The only real trick to beating that EPA average is don't drive like "Joe Average".    It's the same method you used to profit from "Economic Migration" and in doing so beat the 'stats'. But you, like me, are not "Joe Average".     The thing you don't seem to grasp is this "Purchasing Power Index" isn't forward looking. It doesn't predict what it going to be but looks backward and states what it was. They are not telling us what the THINK, they are telling us what they MEASURED. Example:    Wife says "I'm going to lose 40 pounds by Christmas". May she does, maybe she doesn't but the doctors office who weighed her when she made that statement and again at Christmas only REPORTS what the RESULT was. You and I can banter about what was possible and what aunt Tilly did till the cows come home but the result is the result. Arguing otherwise is.....irrational. That's all I'm saying. This isn't about:      What you are calling a 'Statistic' is a RESULT not a CALCUATION and as a result the RULE. Like gravity as a rule, it can not be broken. 
    • MASONV88888888
      Rattle in the rear!

      By MASONV88888888 · Posted

      Just wanted to say thank you for posting this. Years later, your thread is still helping Silverado owners.   I bought my 2025 Silverado 1500 in January 2025, and I've had what feels like the exact same rattle since day one. After reading your findings, I believe my truck has the same issue with the cable carrier contacting the rear sliding window. To be honest, I had pretty much given up on pursuing the issue. It wasn't until I recently drove another brand's pickup that I realized just how quiet their cabin was—and how noisy mine has been all along. On my truck, the rattle happens on almost any paved road, gets even worse on rougher pavement, and I can even hear it during braking and acceleration.   I actually referenced your thread when submitting my case to GM, hoping they'll recognize this as a recurring issue instead of treating it as an isolated incident. The reason I reached out to GM first is because my dealership told me they would need to keep the truck for at least two days just to diagnose the problem. I was concerned that even after two days, they still might not be able to identify the source of the rattle before giving the truck back to me. I had also asked a few dealerships about this issue during previous service visits, but none of them seemed to know what was causing it or had a solution. That's why I decided to contact GM directly first, hoping they might already have an official repair procedure or guidance for this issue.   I also hope GM eventually comes up with an official fix for this problem. I have a feeling there are many Silverado owners experiencing the same rattle, but most either choose to live with it or simply don't know what the cause is.   Really appreciate you taking the time to document your diagnosis. Your post is still making a difference years later.
    • Buckwild27
      Gas Prices

      By Buckwild27 · Posted

      I have 2 choices. 

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...