Automatic braking may not be working?

[Jerry Lee]

I have, on purpose, closely approached the rear of a couple of cars sitting at red lights and I have never felt my brakes automatically try to stop my 2017 Denali pickup. Is this normal?  I have it turned on and also the settings on the steering wheel set to 3 ))). If my system isn’t working, I need to know it. Anybody know a way to test it?

[SS502]

Same issue I have, I don’t trust it one bit to test it. I don’t even get the red light in my windshield, dealer (over the phone) told me it’s because of the leveling kit...I don’t agree but I may be wrong. Oh and my settings are the same as yours 3)))

[B R A D]

Same issue I have, I don’t trust it one bit to test it. I don’t even get the red light in my windshield, dealer (over the phone) told me it’s because of the leveling kit...I don’t agree but I may be wrong. Oh and my settings are the same as yours 3)))

It's not because of the leveling kit, my 2016 was leveled and it worked well. My 2018 has applied the brakes once, I was slowly rolling up to someone at a red light and before I applied the brakes it had already started.

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[DougFL]

You could always get a couple traffic cones and try it in your driveway or a empty parking lot.  If I get too close to a vehicle my HUD Flashes a Red Crash Banner and the seat vibrates. 

[SS502]

9 minutes ago, DougFL said:

You could always get a couple traffic cones and try it in your driveway or a empty parking lot.  If I get too close to a vehicle my HUD Flashes a Red Crash Banner and the seat vibrates. 

Good idea, thought about a plastic trash can that would just bounce away without hurting anything. I know my seat works in lane departures and parking. I’ve seen the red banner ONE time and the seat did vibrate but it seemed almost premature, Ive had people stop or cut me off and when I figured it should work it hasn’t. My windshield and sensors are clean. I have some cones so I’ll give it a shot. Thanks ?

[ftwhite]

The only time I know it works for me is at speed (25+ or something), as it is most active for me on freeways. If there is a exit approaching, and I accelerate up to the car in front of me as I am also taking the exit, I can generally get it to warn me and apply some braking, before it detects I am "switching lanes". I have wondered why it doesn't do this for the stop light or stop and go traffic scenario as well, as that would be just as useful.

[Loco-diablo]

When I bought my new Volvo with auto braking, they demonstrated it in the parking lot using a cardboard silhouette of a pedestrian. So some cones or some sort of standing cardboard cutout should allow you to test it. 

[SS502]

2 hours ago, Loco-diablo said:

When I bought my new Volvo with auto braking, they demonstrated it in the parking lot using a cardboard silhouette of a pedestrian. So some cones or some sort of standing cardboard cutout should allow you to test it. 

...or that pesky Mother-in-law

[Jerry Lee]

Thanks guys. Some good ideas. I have some boxes in the shop from Amazon and Walmart and will stack them in the driveway and see what happens. 

[2003 SSEi]

On my 2014 I have never gotten it to apply the brakes. I don't know if its my driving style or not, but I have only gotten the red warning and seat vibration when approaching and the vehicle infront applys the brakes.  It seems when the brake lights of the vehicle come on I get the red warning and vibration if I get too close

[Brianibew]

2 hours ago, 2003 SSEi said:

On my 2014 I have never gotten it to apply the brakes. I don't know if its my driving style or not, but I have only gotten the red warning and seat vibration when approaching and the vehicle infront applys the brakes.  It seems when the brake lights of the vehicle come on I get the red warning and vibration if I get too close

The 2014 Silverado is not equipped with autonomous emergency braking...only a haptic seat buzz and a red flashing light /and or beeper.

[Jerry Lee]

I stacked up a lot of Amazon empty boxes in the street and drove over them at 20 mph and nothing beeped, buzzed, or brakes come on. Maybe it has to be metal to work?  My truck is a 2017 4 wheel drive 6.2 Denali if that means anything. My sticker says I have brake assist. 

 

I have the brake assist set at the highest level and also have the screen set to alarm and brake. I want that system to work. I may need it some day. 

 

Is there any other way to check this system to make sure it’s working?

Jerry

[SS502]

2 hours ago, Jerry Lee said:

I stacked up a lot of Amazon empty boxes in the street and drove over them at 20 mph and nothing beeped, buzzed, or brakes come on. Maybe it has to be metal to work?  My truck is a 2017 4 wheel drive 6.2 Denali if that means anything. My sticker says I have brake assist. 

 

I have the brake assist set at the highest level and also have the screen set to alarm and brake. I want that system to work. I may need it some day. 

 

Is there any other way to check this system to make sure it’s working?

Jerry

I don’t know Jerry, I have the exact same problem on my 2018 although my LKA and parking sensors seem fine. Do you have a level on yours? I have a 2.25 and the dealer told me over the phone that could cause the problem but I doubt it. Also I get the green car icon when I’m following a car but it rarely ever turns yellow even when I run up on them (tested this with a friend so I wouldn’t get brake checked...literally got within a foot doing 40 mph and nothing at all happened) or they slow down in front of me. I’ve seen the red flashing lights ONE time and there was nothing in front of me. Having dealer check it next oil change.

[ftwhite]

To test it in simulation, my guess is you need to trick the camera into seeing a car, not just boxes. Meaning, probably shape and lights. Parking sensors are radar to any solid object, but lka and brake assist are camera enhanced features with lots of computer processing.

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[Jerry Lee]

SS502 - let me know what the dealership says about why the brake assist is not working. I really want to know if mine are working. Like you, I’ve tested by nearly rear ending a car on purpose and nothing happened. I do get the orange car on the dash when I get close and only got the red warning when a car came across in front of me one time but I don’t think the brakes came on. But not sure; I was distracted by the beeping!  Smile. 

 

Ftwhite - maybe I can make something that looks more like the rear end of a car but would think the brakes should come on when a motorcycle or maybe even a deer is about to make contact with the front of my pickup?  Maybe my dealer has a way to test it. I will ask at my next visit in February.

Thanks guys