general problems of the 2017 GMC Sierra

The contact owns a 2017 GMC Sierra. The contact stated that while parking at 5 mph, the dashboard went black intermittently. The brake was real firm and had became inoperable. The brake pedal was pushed to the floorboard. The service brake assist warning message was illuminated. The vehicle was towed to an independent mechanic. The vehicle had been diagnosed. The failure could not be found. The vehicle had not been repaired. The manufacturer was made aware of the failure and told the contact to take the car to the dealership for diagnostic. The failure mileage was approximately 48,000.

The contact owns a 2017 GMC Sierra ld. The contact stated that on two separate occasions while driving at approximately 50mph, the front passenger side wheel locked inadvertently. As a result, another vehicle crashed into the attached trailer that caused the trailer to jackknife. The driver alert warning light illuminated. The air bags failed to deploy. No medical attention was required. No injuries were sustained. A police report was filed. The vehicle was not diagnosed or repaired. The contact then stated that on a separate occasion while driving at normal speed, the front passenger side wheel inadvertently locked without warning. As a result, the strut detached from the control arm that caused the attached trailer to detach and crashed into the vehicle that caused the vehicle to crashed into a ditch. The rear passenger side air bags deployed however, the front driver and passenger side air bags failed to deploy. No injuries were sustained. No medical attention was required. A police report was filed. The vehicle was towed to the contact’s residence then towed to a body shop. The vehicle was not diagnosed or repaired. The contact referenced NHTSA campaign number (service brakes, hydraulic) as a possible cause. The manufacturer was not notified of the failure. The failure mileage was approximately 51,117.

After parking and backing up when I hit the brakes, they got hard and did not operate properly. When pulling forward the brakes were hard to operate and barely stopped the vehicle. After sitting a while and restarting the truck they operated as they should have. Not sure if this is an operable safety issue but, it was very concerning that the brakes did not operate properly.

I live in oregon, my truck that I purchased from a private owner from utah in June of 2019 had 37,300 miles today's date March 1 2020 my truck has 39,100 miles. A couple of days ago I changed to my oregon license plate. While under the truck I noticed a lot of rust on many parts of the brakes, suspension and frame especially when I lowered the spare tire which showed severe rust damage. This truck has an extreme amount of rust for a vehicle built in 2017. I consider this to be a safety hazard especially because drivers use this type of truck to haul or tow heavy loads.

Truck was recalled for brakes. Recall completed was computer issue. That recall caused brake vacuum to malfunction. Almost cost me my life. 70 mph in dallas TX traffic. Had to slow down quickly. Once it slowed down then it wouldn't stop!!! got it to a parking garage almost hit 3 vehs. It was traumatic. Gm knows about this issue. Many others have reported. Not happy!!!!! gm extended the brake warranty to 150000 miles. That makes me feel better. They put same part back on. So I guess it will happen again. I'm very leary of my truck.

In my driveway on dry pavement at slow speeds when pressing the brake pedal the vehicle does not stop satisfactory. The brake pedal was then pressed until it was very hard the vehicle continued to move but slowly began to stop. When pressing the brake pedal to the maximum and a firm pedal a noise could be heard from under the hood. The noise sounded like a moan, similar to the brake anti skid system being activated. I was able to simulate this braking problem multiple times while backing up and moving forward at slow speeds. Cycling the ignition on and off did not correct the problem.

My brakes are not working to its full potential. I believe my vacuum pump is going back on my truck. I noticed last week that I was driving out of a parking lot and coming to a stop sign and I pressed my brakes and it was not working properly. I had to release the brake and slam on the brakes again almost causing a accident with incoming traffic. I called all my local dealerships and stated that there was no recall on this just yet for my truck, but there is a recall on the vacuum pump. They stated they already did the software update to my truck back in September 2019. My truck was going maybe 10 mph to a stop sign and I applied my brakes once and was not completely stopping, so I took my foot off the brake pedal, and it got worse and I had the brakes pressed all the way down to the floor. This is not safe! this is my daily driver and I drop my kids off to school every day and its not a good feeling knowing my brakes can go out at any time!.

Noticed mushy, vibrating brakes. Took it to tire store and was advised the brake booster and vacuum pump are bad. I've had several close calls in parking lots, as the vehicle is slow to resond to the application of the brakes. The drivers seat is also loose. It moves from side to side as I go around corners. I'm afraid it will come off the rails or worse yet, not secure me in the event of an accident.

Vehicle frequently exhibits loss of braking power. When this occurs, something sounding like the abs systems is sometimes engaged by the vehicle and other times not. While gm claims braking performance meets federal standards, the braking power is greatly reduced when the hydraulic system is engaged and almost non-existent when neither vacuum pump nor the hydraulic system functions. Even if the braking performance meets federal standards, it creates a dangerous situation when the driver is not expecting a failure. A GMC dealership has admitted there is an issue and recommends replacing the vacuum pump but has been unable to source the parts in over two weeks and has no eta for when the part will be available. Meanwhile the braking power loss condition occurs every time the vehicle is driven. During the first instance, I was towing a travel trailer in stop and go traffic down a 7% grade. Had it not been for the trailer brakes, this could have been catastrophic. The second occurrence involved backing into my driveway and nearly causing a collision because of poor braking performance. Now that I fully aware of the issue, the vehicle is driven sparingly (only when absolutely needed) and with great care. The characterization of this issue by gm as not being a grave safety concern is inaccurate. Their inability to source parts in a timely manner is inexcusable.

First and most importantly my brakes are my main issue and safety problem. I nearly ran into the car in front of me at a busy intersection. My trucks brakes lose pressure after the first initial stop coming to any traffic lights, stop sign, slow traffic, parking lots etc. . . No matter how slow or fast the trucks movement is. First break attempt is ok but 2nd starts losing pressure and 3rd attempt is complete lost of pressure anf and the truck just rolls until it slowly comes to a stop. I worry about the safety of myself and others motorist regarding this issue. My second complaint is my driver side mirror. Every time I get into my truck and start it. My driver side mirror moves out of its setting and I constantly have to fix it.

The past month as I push on the brakes driving on the road my steering wheel starts to shake as the brakes are being applied. Does not happen all the time has actually only happened 3 times in a month.

While braking pedal feels like gurgling and at times complete loss of power assist making pedal very hard to depress all were in motion and intermittent making dealer diagnosis difficult and not yet able to replicate so dealer refuses to do work.

October 2019 went to the dealership to have breaks worked on given recent recall about the mechanical vacuum pump output may decrease over time, decreasing the amount of vacuum/power brake assist. However, shortly after getting the recall done on my truck (1 week later) I was in the parking lot backing up out of my parking spot and the break pedal became really stiff and I couldn't push hard enough to stop the vehicle from moving. I just kept rolling until I hit the curb. So far this has happened a dozen times and all when I was moving about 5 miles an hour the exact same way, pedal becomes stiff and I couldn't stop the truck from moving. I feel like things are worse now after getting the recall done. This was never an issue before and as I look at the recall notice, it state incomplete, telling me possibly the manufacture knows there's still an issue but no fix has been done yet, even after 4 months.

Lost brake assist. Coming to a stop the brake pedal whet to the floor and the anti lock brakes started chattering. The brake pedal was hard as a rock and took 2 feet to stop. I was on a 170 mile trip and almost hit someone 2 times.

For NHTSA recall 19v645, why did NHTSA accept a �reprogramming� of the functionality to �band aid� the issue rather than requiring replacement of the vacuum pump, which is the identified defective item?.

Original issue: brake pedal hard to push and truck did not stop normally at low speeds. Could reproduce issue usually pulling into a parking spot. My vehicle would have hit car in front of me if I hadn't used ebrake. Took to dealer, dealer applied software update to braking system. Upon pickup I discovered the original issue persisted and now had an additional issue. Now at almost every brake event, the abs would engage and cause the brake petal to chatter/vibrate. Dealer and gm customer service tried to tell me that was normal after the recall update. I told them that couldn't be normal. It wasn't happening before. After not excepting that as a fix, the dealership started looking for other possibility's. After telling the dealer I was going to take the truck somewhere else they decided to replace the vacuum pump. The new vacuum pump fixed both issues! I'm just saying if the recall update is causing more problems then what it was intended to fix. Now there could be a more serious problem on the highway. Please look into these issues. I feel like gm is trying to hide a big problem.

A few times my brakes while going slow would get very tight and not work. Well today after church I was leaving the parking lot. As the car in front of me moved forward, so did I. When I tried to stop I couldnt. My brakes got hard and went to the floor and I ran right into the car in front of me.

Anti-collision system is activated, I apply breaks, break peddle is soft and goes to the floor, I swerve to avoid collision and quickly pump the breaks to regain peddle and apply breaks again (this time brakes engage). 6 different times this has happened. 4 times on the interstate during rush hour and twice on a highway. Car in front of me slammed on the breaks cause the system to activate and me to react. It appears the system overrides the brakes taking control away from me. However, the system does not brake the vehicle. Another occur was when I was launching my boat into the lake. I was backing up and lost brake pressure and had to apply my emergency parking brake to stop my truck from going into the water. This vehicle has been checked by 2 different dealers, 4 different times in the past year. I do not feel safe driving this vehicle. The date listed below was the last occurrence when this happened. (not the prior 5 occurrences).

As I was backing up I applied my brakes and for some reason nothing happened which resulted in my hitting my wife's car and damaging her drivers side quarter panel. When I asked GMC about the issue they said it was just an error on my part. Now I find out that there is a recall on the braking system that the pressure to the brakes may be affected. Who is responsible for the damage to her car?.

Vehicle has hard shift at 5-6 mph. Dealer stated could not find issue, and reflashed tcm. Approx month later, at 10k miles, truck hard shifted from red light on highway, once up to 45 mph, shutdown. Steering wheel locked up, no brakes, no control of vehicle at 45-50 mph. Dealer kept for one week, stated loose cable on starter from battery. Exactly 1k miles later (5 weeks), now at 11k miles, truck hard shifted at 5-6mph, and at 45-50 mph truck tried to shift in 4wd. All lights on dash came on as a result. Dealer has currently had the truck for two weeks and can not find issue. They supposedly consulted gm, and instead of sending an expert tech to help dealer find issue, advised dealer to replace ecm. Replacing ecm is the general answer to not sure what is wrong. This truck is a safety issue, as when it shuts off going 45-50 mph there is no control or brakes operational on the vehicle. Gm will replace the ecm, and just like right now, will not be able to replicate the problem, and expect me as the consumer to take delivery back of the vehicle. Currently all of my documentation is in the dash of this truck, at the dealership. Trying to determine how myself as the consumer can help ensure this safety issue is corrected, and not passed on.

I almost killed a kid today parking for a baseball game. I was traveling slowly and parking when my brakes became hard to push and failed. Truck went over curb and toward kid putting on his cleats and not facing me. I was able to push as hard as I could and it stopped. I backed up and brakes worked again. I have 46,000 miles on the truck. I am now afraid to drive it, but it seems they are working again. If this is common, GMC needs to take care of this. Someone will soon be hurt seriously!.