While parking in San Francisco after driving for about 100 miles, the brakes felt they had lost all power, the pedal was pressed down to the floor and caused the braking distance to increase drastically. There was a fence post to the left of my truck. So I was going to go forward a little then back up and straighten out to pull forward and finish parking. Going slow 3-5MPH I pressed the brake and the truck kept going forward, I felt a shake from the brake pedal and then no pressure, straight to the floor, then the brake pedal didn-??t return up. i kept pressing/pumping the brake pedal but still felt like there was no power at all. When you released the brake pedal the pedal would not return to the top like normal. So the truck would not stop, it felt like forever, but when the truck did stop it had just come to rest on the fence post left of me, causing a small dent on the, rear passenger, driver side door. This was really scary because I was parking on a ocean pier and I though I was going to go into the fence in front of me and then into the water. I know now that that was most likely not going to happen because of the low speed I was going at but non the less SUPER SCARY. So now I have a dent on my truck and I am also scared to drive the truck because the brakes might not work when I need them too.

- Salinas, CA, USA

Power brake booster failed, truck would not stop in a timely manner

- Arlington, TX, USA

Brakes will sometime seize up and not allow car to stop in sufficient time.

- Isle Of Palms, SC, USA

Out of the blue I am getting constant trailer brake system alarms dinging at me. Even if I select dismiss the alarm keeps coming back. There seems to be no way of getting this to stop.

- Pontiac, IL, USA

At low/idle speeds the brake pedal becomes hard and will not stop. At speeds between 35-75mph the engine/transmission has a vibration about every 10seconds and the transmission shifts hard and/or rough at times when first taking off.

- West Monroe , LA, USA

At low speed (5 mph or less), my GMC truck looses brake pedal resistance and I have to mash the pedal hard to stop.... very dangerous when in traffic, parking lot or pedestrians crossing in front. This needs immediate attention. No warning lights on dash. After researching this issue online I discover there are many youtubes and complaints about this apparent brake vacuum pump problem). I also see where there is a recall of over 3.5 million Chevy/GMC vehicles (recall #s N202300860 and N192268490) for this exact low speed brake pump problem. My GMC truck falls within this recall (GMC Sierra LD between 2014 and 2018). But when I check my VIN # on the NHTSA website, it states no recall. How can this be? It clearly is the exact same issue.

- Melbourne, FL, USA

Was in a parking lot, moving just 2mph and had to literally mash down on the brake pedal - both forward and backward. Also, I put my truck in drive and has been making a noise in the transmission it seems and is a loud + lurches forward a bit. Additionally, I was traveling on vacation to Rockport, TX. I've made a appointment with the dealership here at 10:00 A.M. on 9 Dec 22, it's the earliest I can get my truck in. There was previously a brake issue covered under warranty & should be again!

- Deepwater, MO, USA

Brakes give out in the parking lot or at low speeds out of no where. I was told there are recalls for this but I looked it up and it-€™s saying no? I don-€™t wanna have a brake failure and wreck. Looking for some help please

- Lake Wylie, SC, USA

I'm having problems with my low speed braking. When I am breaking at low speed such as at a stop sign or parking, it's like the pedal stops working, gets stiff, and I have to brake very hard to get it to work. This is of great concern to me as a safety hazard. Unable to stop in a parking structure or at a stop sign/signal can be fatal and this needs to be addressed and dealt with immediately.

- Constantine, MI, USA

Trailer brake system service light

- Bay City, MI, USA

The brakes stop working at low speeds and the brakes drag and it doesn-€™t stop.

- Charlotte, NC, USA

At low speeds my brakes do not work well. Mostly while driving at idle speeds like in a parking lot the brake pedal gets hard and the truck does not stop very easily. If you idle the truck up to a higher RPM, the brakes begin to function properly again.

- West Monroe , LA, USA

I purchased a certified pre owned 2016 sierra slt in February and just after a month of owning it a notification started to pop up and chime on my dash stating "SERVICE TRAILER BRAKE SYSTEM". I have had my truck in the shop multiple times after to have this issue repaired and nothing has worked. They replaced the dash GM Genuine Part 84108373 break controller switch and buttons, the GM Genuine Part 23337305 trailer brake control module as well as the 7/4 pin 23404450 GM OEM Trailer Tow Receptacle. Nothing has fixed this issue! when the truck chimes I lose my trailer breaks and this is extremely dangerous hauling a camper weight 6500lbs. I also lose the ability to make phone calls, hear my blinker also the radio. This renders my truck inoperable and a danger to drive.

- Rochester, NY, USA

We recently had the recall installed on our truck, which was a brake software update for "increased brake pedal effort". No other work was performed and we had had no other issues prior to the recall being performed. Now, after the recall software update, we have all of the symptoms of the low speed increased brake pedal effort. There have been multiple times where we can barely get the truck to stop at low speed in a parking lot. The brake pedal vibrates and can hardly be pressed. Took it back to the dealer to complain about the recall installed and they said they would give a small discount for a vacuum pump repair but other than that there was nothing they could do due to our high mileage.

- Elysburg, PA, USA

Brakes failed in parking lot, had a solid pedal and could not get truck to stop

- Phoenix , AZ, USA

The contact owns a 2016 GMC Sierra 1500. The contact stated while attempting to park the vehicle, the brakes failed to function as needed while being depressed. The contact stated no warning light was illuminated. The vehicle was not diagnosed or repaired. The manufacturer was informed of the failure and was awaiting a response. The failure mileage was unavailable.

- Edna, TX, USA

At low speed, parking in reverse, brakes began failing. Symptoms included a vibrating brake pedal, and a large change in the amount of pressure needed to depress the brake pedal (low pressure required). Pedal went to floor without stopping power. Symptoms match existing NHRTA campaign 20V603, but 2016 is not currently covered by the existing recall.

- Melbourne, FL, USA

-Engine gas consumption states 21 MPG Highway, 17 MPG combined and 15 MPG City. -When I started using vehicle during the first weeks and months the best MPG I could geta at the highway was 18.5 MPG with top-tier gas. -Ever since I bought the vehicle, the gas MPG have gone down around 0.5 MPG. The vehicle feels that it has to use more gas in order to perform the level of task everyday. -The motor oil pump at times moves down from the 40 mark to the 20 mark when idle at traffic light and it starts moving, it temporarily goes to the 60 mark. At other times when idle it stays in the 30 mark. -The transmission is an 8 speed automatic. It has issues shifting 1st and 2nd gear, and at times 3rd gear as well. When driving at slow speeds like in a traffic jam, mall parking, do a u turn or when you slow down at the traffic light and then turns green and you start accelerating again it feels harsh on gearing up and down. -This vehicle has the Active Fuel Management (AFM) system, it turns on even at slower speeds and you feel how the engine and transmission struggle to accelerate, go a gear up and push the vehicle with only 4 cylinders. Like in manual transmissions when you accelerate on a higher gear than the correct one, it takes forever to accelerate and properly change to 8 cylinder and establish the correct gear and ratio. -Even if all 8 cylinders on it it feels like if I am running on a smaller engine. -There was a fix done to the transmission for a valve, but the vehicle still runs the same as before. -There is a knocking noise starting to build in the engine. Best mileage I can get driving the same and gas is 13 MPG combined. -The recent safety recall for the breaks is actually making the breaking worse than before. -My vehicle is 2016 GMC Sierra All Terrain V8 5.3L 4WD Z82 with 36,500 miles on it and is doing all this and its getting worse little at a time.

- El Paso, TX, USA

At very low speed, my brakes fail. They work fine at regular speed. It-€™s only when I am parking or like at a drive thru. I almost hit someone.

- Alice, TX, USA

Brakes at low speeds and in drive ways and parking lots when stopping brakes won't work very dangerous a recall was issue but not for my truck, the vacuum pump is bad on my truck

- Bakersfield , CA, USA