Jump to content

Hill Decent Control

BringTheRain403

Recommended Posts

Dnt Senior Enthusiast

Dnt

Posted
Posted

ACTUALLY....

 

I think we are discussing 3 distinct things here.

 

One is Hill Start Assist, and it's just what it sounds like, it holds the brakes for up to 1.5 seconds while facing uphill or until you hit the gas. Keeps you from rolling back. I would say this is handy, and it probably is, but where was this in the days of a manual slush box???

 

One is Grade Engine Braking (really not sure of the name, or IF it has a distinct name). Think of it as a cruise control jake brake. It uses the engine to maintain speed downhill, particularly when you have a load. It can rev the engine rather high, you'll know it when it happens. I think this is standard issue on nearly, if not all trims. It works at higher, cruise speeds and doesn't involve the brakes.

 

Last, but not least is Hill Descent Control. Only comes on certain packages, (I know AT has, I think Z71 has as well), and it requires a push of the button. Low speed operation only, think <37 mph or something like that. It's like cruise control for SLOW down hill descents. Uses a combination of engine braking (mentioned before) and conventional braking. Yes, it will apply the brakes FOR you. But, at least you have to actively select this by pushing the button on the console. Do you have it? Well...do you have the button??

Dang it man, these new trucks may require a 30 hour training class to properly use all the features. I have the Z71 package and will try that hill descent button thing this weekend. Sounds like fun. But still what is this Hill Decent thing? I cannot find a reference to that in the Manual. Does it make sure you are dressed correctly to offroad? maybe chastises you if you do not have on a proper Go To He** hat/ Your beer cooler is getting low or maybe you do not have on clean underwear or something? hahaha my fav truck made a funny.... Have a great day.

  • Replies 65
  • Created
  • Last Reply
MikeNH Senior Enthusiast

MikeNH

Posted
Posted

It will hold a low speed going down hill without you using the brake pedal.

fondupot Senior Enthusiast

fondupot

Posted
Posted

havent used the truck offroad yet, but I think it only works at below 15 mph or so.

jnaugle775 Enthusiast

jnaugle775

Posted
Posted

I have it on my Z71 and its awesome. I live on a very steep north facing hill. Most of the winter it has been covered in snow or ice. The truck just walks it right down the hill with no issues. I will never go without this feature again!! Its the best part of the Z71 package

HDNitehawk Enthusiast

HDNitehawk

Posted
Posted

Amazing...

 

I asked the salesman what this button did on the Z71 and he told me you pushed the button when you were parked on a steep incline and needed to start your vehicle.

Your fuel runs to one side of the tank and this button helps pick up fuel so you can start.

bdbake01 Senior Enthusiast

bdbake01

Posted
Posted

Amazing...

 

I asked the salesman what this button did on the Z71 and he told me you pushed the button when you were parked on a steep incline and needed to start your vehicle.

Your fuel runs to one side of the tank and this button helps pick up fuel so you can start.

 

Seriously? I mean...seriously? WTF????

 

"That button there, that's the cruise control. One press of that and you can crawl into the back and take a nap. Before you do, make sure the truck has plenty of change for toll so you don't get woken up at the toll booths. And this truck isn't equipped with the optional opposable thumbs so you'll have to make sure the nickels are properly loaded into the nickel dipsenser. It's this little thing here that kinda looks like a household outlet. But isn't. Trust me."

 

So how would it do this anyway? Tilt the gas tank back up straight so everything works again?

MikeNH Senior Enthusiast

MikeNH

Posted
Posted

Not too uncommon for sales people to be clueless sadly. The good ones will educate themselves. When I was at the dealer in the service dept there were a couple of decent salespeople who'd come to me with questions if something wasn't clear to them. I'm not sure what sort of new model training they got but at least a few cared enough to fill in the gaps.

Dnt Senior Enthusiast

Dnt

Posted
Posted

Amazing...

 

I asked the salesman what this button did on the Z71 and he told me you pushed the button when you were parked on a steep incline and needed to start your vehicle.

Your fuel runs to one side of the tank and this button helps pick up fuel so you can start.

Dang man that salesman is good LMFAO hey Nitehawk are you and Dragon still hanging out together. DONT TOUCH MY STUFF (oops some people might not be Will Ferrell fans for those people check out the movie stepbrothers)

Texas Husker Senior Enthusiast

Texas Husker

Posted
Posted

Dang man that salesman is good LMFAO hey Nitehawk are you and Dragon still hanging out together. DONT TOUCH MY STUFF (oops some people might not be Will Ferrell fans for those people check out the movie stepbrothers)

 

Ketchup and onions.

 

 

 

This thread is one option away from an Abbott and Costello skit :crackup:

redwngr Senior Enthusiast

redwngr

Posted
Posted

Dang it man, these new trucks may require a 30 hour training class to properly use all the features. I have the Z71 package and will try that hill descent button thing this weekend. Sounds like fun. But still what is this Hill Decent thing? I cannot find a reference to that in the Manual. Does it make sure you are dressed correctly to offroad? maybe chastises you if you do not have on a proper Go To He** hat/ Your beer cooler is getting low or maybe you do not have on clean underwear or something? hahaha my fav truck made a funny.... Have a great day.

Here's the manual reference:

Hill Descent

Control (HDC)

If equipped, HDC can be used when

driving downhill. It sets and

maintains vehicle speed while

descending a very steep incline in a

forward or reverse gear.

The HDC switch is on the center

stack, below the climate controls.

Press 5 to enable or disable HDC.

Vehicle speed must be below

50 km/h (31 mph).

The HDC light displays on the

instrument cluster when enabled.

HDC can maintain vehicle speeds

between 3 and 22 km/h (2 and

14 mph) on an incline greater than

or equal to a 10% grade. A blinking

HDC light indicates that the system

is actively applying the brakes to

maintain vehicle speed.

When HDC is set, that is the initial

set speed. It can be increased or

decreased by applying the

accelerator or brake pedal. This

adjusted speed becomes the new

set speed.

HDC will remain enabled between

22 and 60 km/h (14 and 37 mph),

however vehicle speed cannot be

set or maintained in this range.

It will automatically disable if the

vehicle speed is above 80 km/h

(50 mph) or above 60 km/h

(37 mph) for at least 30 seconds.

5 must be pressed again to

re-enable HDC.

When enabled, if the vehicle is at a

speed above 22 km/h (14 mph) and

less than 60 km/h (37 mph), a DIC

message will display.

 

Dnt Senior Enthusiast

Dnt

Posted
Posted

Gawd I made it almost all the way through the instructions without dozing OFF Yaaaaaaaaawn. I think I have enough information to have a Decent Descent now thanks.

  • 1 month later...
Norcal Flyfisherman Enthusiast

Norcal Flyfisherman

Posted
Posted

Has anyone used the Hill Descent Control? Not the automatic grade braking, but the Hill Descent Control that is engaged by pressing the button on the center stack? I've been playing with mine a little bit, and it seems to work well.

 

How are other using it? Does it make noise? I've used mine in 4 HI, Auto 4 wheel drive, and 2 Wheel drive so far, and I hear a noise from the front end in each.

gtptyler Enthusiast

gtptyler

Posted
Posted

I have no hills to try it on around here ha going to have to find one eventually

fondupot Senior Enthusiast

fondupot

Posted
Posted

My truck is a street queen yo!

 

Seriously though. I have not had a chance to use it yet. Cant even imagine going offroad with the air damn hanging so low on these trucks. Mine will be coming off soon...

Norcal Flyfisherman Enthusiast

Norcal Flyfisherman

Posted
Posted

Yeah, I haven't done anything rough with mine either. That's what the jeep is for. I spend some time on steep hills though, and the Hill Descent seems like a nice idea. I wasn't expecting to hear a noise when I used it though. Maybe it has to do with how that system uses the antilock brakes...

Archived

This topic is now archived and is closed to further replies.

Go to topic listing

  • Latest Articles

  • Posts

    • Chuck FB
      OCI, not when but why?

      By Chuck FB · Posted

      I imagine the cold winters up here with repeated short runs in town every day for those that live and work in town and given what I have come to learn on this forum with DI engines having fuel dilution issues, and if they don't change the oil until it says to but keep driving it for a while, I bet all that is just lovely on those finicky lifters. 
    • teamjnz
      AWD conversion to Z71

      By teamjnz · Posted

      I just did some reading and Stabilitrak is more than a what I had originally thought. It is more of a vehicle control system to help the driver in precarious situations. I thought it was only the AWD system. Now I know. So I changed the title for this thread to AWD conversion to Z71 
    • teamjnz
      AWD conversion to Z71

      By teamjnz · Posted

      Sounds like converting will be a bigger endeavor than I was thinking. This truck doesn't have 2Hi like the Suburban did. The Tahoe has 4Hi and 4Lo and a button to turn of traction control.   From what I understand the Stabilitrak uses open diff in the front and rear. When wheel speed is not the same the stabilitrak uses the ABS system to slowdown the spinning wheel(s) to transfer power to the slower non-spinning wheel(s). I thought the transfer case was open too. Being able to transfer power either more to front or rear depending on wheel spin. Maybe I miss understood some information with you saying and power transfer is 50-50. Thanks
    • PunchT37
      OCI, not when but why?

      By PunchT37 · Posted

      My brother has a 2007 Avalanche with afm 5.3. It`s got 176,000 miles. Runs like a clock. Never been apart. Co worker has a 2010 Tahoe with afm 5.3. 230,000 miles. Never been apart. Runs like a clock. So, even though cyl deac is a weak spot, they can go the distance.   BUT, these engines had the oil changed regularly, AND had 5w30 as spec. I wonder if they would have lasted this far on 0w20? I`ll bet not.
    • Chuck FB
      OCI, not when but why?

      By Chuck FB · Posted

      I certainly could be wrong but I hear of pickups far newer than that 2007 cutoff which may not be going to the wrecker but are having engine work done and be that a reman engine or new engine or trying to repair the existing engine. Some of it would be design issues as per the cylinder deactivation system that GM has and one of those lifters wiping out the cam and the question of oil changes moving the needle or not on that whole mess, or in the case of Ford pickup engines that have the long timing chains and wearing them out and the roller followers and phasers and some of that certainly goes back to oil change intervals. But in those various cases the truck has all sorts of life left in it and so the unfortunate owner and may be original owner or used market owner that is pouring money into repairs so the truck is not seeing the salvage yard yet but damage is happening by infrequent oil changes. A friends son had bought a 2018 I think it is half ton GM and it had some sort of extended or used dealer warranty on it and of course the lifter issue bites and its rattling and so the dealer had to swallow the bill and was at least 7000.00 and I think they only replaced what they felt they had to replace so yeah, I can see that being a ticking time bomb in the not too distant future. Would frequent oil changes cure all these engineering "marvels", probably not but some engine designs have shown that they do much better if the oil is changed a lot more often then if the manufacturer service claims are followed. New trucks cost so much that there is an incentive to keep the existing truck on the road by repairing. 

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...