At low RPM,'s and at low speed the vacuum assist pump cannot supply enough assist pressure to the brakes, this does not let the power brakes work as they are designed. When this happens, mostly when backing a trailer up but also when going forward at slow speeds, there is no power assist brakes and a type of manual brake exists. This type of manual brake requires maximum leg pressure is required to slow down and/or stop, and when pressure is applied there is a time lag for pressure to be applied so that the vehicle stops.this same problem occurs with no trailer load involved and the vehicle is going slow. It is a dangerous situation when entering traffic at a perpendicular angle. Other complaints have been made regarding the same problem.
2016 GMC Sierra 1500 brakes complaints
Page 5 of 5: complaints 101 to 106 of 106, newest first, as owners wrote them.
The brakes on my 2016 gmc sierra 1500 with only 31,700 miles exhibited a hard brake petal and the vehicle would not stop. This happend at slow speeds while attemping to stop in parking spaces and at red lights on local roads.most frightening was while back my truck and boat into a boat ramp the brakes would not stop the vehicle! I brought the truck to the local dealer who replaced the brake booster & the vaccum pump. I questioned if there were any service bulletins and I was told there were none. Fearing this could happen again , I searched on line and found other complaints effecting not only my make and model year but other gm/gmc models and years. I also found a texas lawsuit where the plaitiffs experience was very similiar to mine. I contacted gmc customer support to lodge my complaint and requested an extension to my bumper to bumper warranty . I was instructed to contact my local dealer to purchase and extended warranty. They went on to say there are no service bulletins or recalls for this issue for my vehicle.... This needs to be investigated as I am of the opinion that this is a saftey issue that is not being addressed properly. A vehice with less than 32,000 miles should not be having this type of dangerous problem . I'm of the belief there is a defect somewhere that needs to be fixed based on the complaints I'm seeing from others online.
While driving at slow speeds the break pedal will not depress. The pedal seems to get stuck. When this happens it is difficult to come to a complete stop.
Brakes are hard to pres and cause the vehicle to not be able to stop. The problem occurs at low speeds when parking or at stop lights. Vehicle has 48k miles.
Vacuum pump failure. The truck had the vacuum pump fail after only 56,xxx miles. The pump failed and cause me a hard brake pedal while coming to a stop. The part internally failed and was not producing enough vacuum to supply the brake booster. After discussing this with the dealer it was a common problem and not covered by warranty.
When the peddles are raised and you step on the brake you could be pushing the gas and brake at the same time. When the peddles are lowered this does not happen. A lot of people step on the side of the brake and it happens only when raised.
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