Jump to content

Grade Braking??

Dusilligaf
 Share

Recommended Posts

Dusilligaf Enthusiast

Dusilligaf

Posted
Posted

So I traded in my 2015 1500 GMC Sierra, which had Max Trailer tow Pkg...it had grade braking....drove down a long steep hill with the brake on and it engaged, using the the engine and trans to slow down until you hit the gas and it it turned off....

I just picked up a new 2021 2500 Denali HD GAS....it does not seem to have it, which is surprising to me...unless I'm missing something, does it have to be in tow mode maybe??

Going from a 2015 SLT to a 2021 HD Denali I keep finding things that I miss from older truck that this new one doesn't do....

MTU Alum Enthusiast

MTU Alum

Posted
Posted
9 minutes ago, Dusilligaf said:

So I traded in my 2015 1500 GMC Sierra, which had Max Trailer tow Pkg...it had grade braking....drove down a long steep hill with the brake on and it engaged, using the the engine and trans to slow down until you hit the gas and it it turned off....

I just picked up a new 2021 2500 Denali HD GAS....it does not seem to have it, which is surprising to me...unless I'm missing something, does it have to be in tow mode maybe??

Going from a 2015 SLT to a 2021 HD Denali I keep finding things that I miss from older truck that this new one doesn't do....

It's more aggressive when tow / haul is engaged.  Also a brake apply helps start the grade braking if you don't have the cruise on.

 

#iworkforGM 

Dusilligaf Enthusiast

Dusilligaf

Posted
  • Author
Posted
11 minutes ago, MTU Alum said:

It's more aggressive when tow / haul is engaged.  Also a brake apply helps start the grade braking if you don't have the cruise on.

 

#iworkforGM 

I was used to coming on with or without trailer mode. it would actually say on the dash screen "grade braking active"...

I dragged the brake pedal all the way down a steep hill in my new truck and got no message and no feel of the engine revving me up to slow down...but I wasn't in tow mode...ill guess ill have to try it that way?

RugbyRef Enthusiast

RugbyRef

Posted
Posted
9 hours ago, MTU Alum said:

I don't believe you will get a message any more.  You may need a little more aggressive with your brake apply.  

 

#iworkforGM 

 

 

I believe you are correct.  I live in an area that has a lot of hills and valley's, and when I am heading down a particularly steep hill, and brake, the engine braking kicks in until I either accelerate or get to the bottom of the hill.  No indicators light up on the dash to inform me of the engine braking the truck...but you can certainly feel it happening.

Dusilligaf Enthusiast

Dusilligaf

Posted
  • Author
Posted
1 hour ago, RugbyRef said:

I believe you are correct.  I live in an area that has a lot of hills and valley's, and when I am heading down a particularly steep hill, and brake, the engine braking kicks in until I either accelerate or get to the bottom of the hill.  No indicators light up on the dash to inform me of the engine braking the truck...but you can certainly feel it happening.

You have a gas motor, correct? And you notice it when driving it in normal mode, not just trailer mode?

RugbyRef Enthusiast

RugbyRef

Posted
Posted

@Dusilligaf - I have a diesel, so I'm not sure if that makes a difference...and, yes, it happens in normal driving mode as well as tow mode.

Dusilligaf Enthusiast

Dusilligaf

Posted
  • Author
Posted
11 minutes ago, RugbyRef said:

@Dusilligaf - I have a diesel, so I'm not sure if that makes a difference...and, yes, it happens in normal driving mode as well as tow mode.

I believe there is a switch on the console in the diesel truck for grade braking that I do not have in the gas truck...

mrjulian416 Enthusiast

mrjulian416

Posted
Posted

In my experience, with the gas engine, you have to be in tow/haul mode for "grade braking" to come on.  When in tow/haul, I've noticed the truck will apply engine braking even on level ground, whether loaded or not.

  • Like 2
JCunningham Enthusiast

JCunningham

Posted
Posted

the Diesels have a engine brake ( uses exhaust not brakes) not grade braking. the Z71s have hill desent control but that requires you to be going below 31mph for it to activate. 

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

  • Latest Articles

  • Posts

    • KARNUT
      Missing thrust bearing? And oil selection

      By KARNUT · Posted

      I find it amusing the OP doesn’t realize this threads heading includes several engines. He should have posted in the off topic section if he wanted a more narrow focus. I really appreciate and find amusing that he actually pointed out one of my many vehicles. The Odyssey. That happens to use 0-20 oil. I love pushing his buttons. 
    • Black02Silverado
      Missing thrust bearing? And oil selection

      By Black02Silverado · Posted

      Maybe, but it seems he is the only one that has backed up data to prove what he is stating. I think he is doing this more because he enjoys it and wants to get the information out to us. He's got the knowledge and access to the proper equipment and having the funds doesn't hurt.  I would love to do what he is doing and would do it if and when I hit the Powerball.  I'm not a Tribologist by any means but love to learn what I can.   I would bet there would be doubting people out there if a completely independent lab with high quality work and highly respected in the automotive industry, put out information like this.  The world can't be pleased, one just has to take the information that they are given, do more of their own research to find actual lab data to back up what they are trying to figure/find out.  Most don't bother, they just want to believe what they first see.     I don't have the minimax but my 6.2 in my 2019 Silverado with 64k miles shows excellent UOA results with 0w-20 and for my own purposes 5w-20.  Since not much of a change using 5w. I liked the data sheet information on the SS 5w-20 and figured I would give it a try.  Still the same viscosity at 100℃.   In the end we all just do what makes us happy, life is too short to get upset over trivial social media.   On a side note, I do feel GM has dropped the ball and just cares about the bottom dollar and not quality anymore.  "Like a Rock" has been long gone.  Seems "Built Ford Tough" has as well.
    • Tyler Gibbs
      Thoughts on these wheels?

      By Tyler Gibbs · Posted

      Better than stock but that's like putting lipstick on a pig
    • flattop
      2026 sierra bad brake controller

      By flattop · Posted

      Hello, my 3 month old Sierra Elevation wont recognize a trailer with electric brakes? All the lights work correctly, but no power to the brakes?   This is the factory installed brake controller. If you manually push the knob, the display shows the power % but does not light up like my 2022 silverado.   I have an appointment with the dealer, but was checking to see if anyone else has seen this issue.    Thanks, 
    • Black02Silverado
      Post your latest oil change.

      By Black02Silverado · Posted

      Been using SS 0w-20 from new, but wanted to change to the 5w-20 because I liked the data on the data sheet, to me it seems like a little better product. But as you can see, not much difference. This is also with running a mix of 10 gallons E85 to a tank topped with 93. It isn't a flex fuel vehicle so any higher I get a CEL for running lean on both banks. Yes my mileage takes a hit. Instead of 20 mpg I normally get on trips I get 17mpg. This is also using EaO17 filter.  What is amazing is I have the AMSOIL cone filter on it since I have the GM Performance intake installed and that air filter has 44k miles on it.  I just take it out and shop vac it off once a year.  I use the upholstery tool on my shop vac.  Works well.   

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...