Hill decent control

[brifly007]

So I'm going to a friend of mine house this weekend, he has 6 acres of land. I'm going to be doing some stuff with my truck. It has lots of hills and was going to try out my hill decent. Has any one used theirs yet? If so, how does it work? Does it only work in 4 low? And can you set the speed or does it do it its self?

Don't rely on it! I have a 2016 GMC 1/2 Z71 4x4 and I have tried it several times and it cuts out about .2 of a kilometer or .12 of a mile. That is with an empty load. I was coming down a friends driveway at Christmas time and his driveway is long and has an approx 11% grade at times. I thought I would give the Hill decent control another chance, it almost caused an accident. It was going good and then as I was just to turn a sharp corner, it "kicked out" and started to free wheel and we started to slide towards the ditch and a cliff. I have had my truck into GM 3 times to have it fixed and they say that there is nothing wrong with it. it's obvious their engineering dept didn't check it out before they certified it. It's crap and don't rely on it, it will cause an accident.

[brifly007]

You can always look in the manual and the MyGMC/Chev phone app gives access to manual as well there is a thread sticky above in this very forum.

 

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 the system is actively applying the brakes to maintain vehicle speed. When HDC is activated, the initial HDC speed is set to the current driving speed. It can be increased or decreased by pressing the +RES or SET- steering wheel controls or 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. See Vehicle Speed Messages 0 164.

 

You can always look in the manual and the MyGMC/Chev phone app gives access to manual as well there is a thread sticky above in this very forum.

 

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 the system is actively applying the brakes to maintain vehicle speed. When HDC is activated, the initial HDC speed is set to the current driving speed. It can be increased or decreased by pressing the +RES or SET- steering wheel controls or 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. See Vehicle Speed Messages 0 164.

Don't rely on it! I have a 2016 GMC 1/2 Z71 4x4 and I have tried it several times and it cuts out about .2 of a kilometer or .12 of a mile. That is with an empty load. I was coming down a friends driveway at Christmas time and his driveway is long and has an approx 11% grade at times. I thought I would give the Hill decent control another chance, it almost caused an accident. It was going good and then as I was just to turn a sharp corner, it "kicked out" and started to free wheel and we started to slide towards the ditch and a cliff. I have had my truck into GM 3 times to have it fixed and they say that there is nothing wrong with it. it's obvious their engineering dept didn't check it out before they certified it. It's crap and don't rely on it, it will cause an accident.

[brifly007]

Don't rely on it! I have a 2016 GMC 1/2 Z71 4x4 and I have tried it several times and it cuts out about .2 of a kilometer or .12 of a mile. That is with an empty load. I was coming down a friends driveway at Christmas time and his driveway is long and has an approx 11% grade at times. I thought I would give the Hill decent control another chance, it almost caused an accident. It was going good and then as I was just to turn a sharp corner, it "kicked out" and started to free wheel and we started to slide towards the ditch and a cliff. I have had my truck into GM 3 times to have it fixed and they say that there is nothing wrong with it. it's obvious their engineering dept didn't check it out before they certified it. It's crap and don't rely on it, it will cause an accident.

[asilverblazer]

I used mine when I was doing some rocky mountain trails this summer in Colorado. It worked pretty good. My only complaint is that it would shut off after a period of time. It doesn't appear to work over the period of several minutes. I think my brakes were getting hot. I was going very slow in 4LO down very steep inclines.

 

Mine did the same... No mention of anything like this in the manual, I'm not sure if its an issue or not. When mine would shut off it would display a message similar to "Service Stabilitrack or Hill Descent" It's been a while since I saw it. It turned, both Stabilitrack and Hill Descent off. I was able to manually turn them back on, and proceed as I was before.

 

It was startling to be easing down the hill and all of sudden it shut off, and away we go...

[Krusty]

How many miles do these rigs go before needing brakes? Between StabiliTrak and what not the brakes get applied a lot!

[brifly007]

So I'm going to a friend of mine house this weekend, he has 6 acres of land. I'm going to be doing some stuff with my truck. It has lots of hills and was going to try out my hill decent. Has any one used theirs yet? If so, how does it work? Does it only work in 4 low? And can you set the speed or does it do it its self?

Don't rely on it! it could leave you in a very dangerous position! It kicks out on it's own. The engineering dept doesn't know what they were doing!

[brifly007]

 

Mine did the same... No mention of anything like this in the manual, I'm not sure if its an issue or not. When mine would shut off it would display a message similar to "Service Stabilitrack or Hill Descent" It's been a while since I saw it. It turned, both Stabilitrack and Hill Descent off. I was able to manually turn them back on, and proceed as I was before.

 

It was startling to be easing down the hill and all of sudden it shut off, and away we go...

You just can't rely on it! GM doesn't think they have a problem, but I care to differ! I almost went over a cliff on a snowy road and the only thing that saved me was that at the last moment I put my foot on the accelerator and engaged the wheels to pull me onto the road. It was a gamble, but the only option I had left! I was in 4 wheel drive and in 2nd gear with the hill decent on. GM should either fix it or get rid of it! It will cause some unsuspecting driver a bad situation.