This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.
So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.
Loss of power brakes at low speed especially in traffic and parking with repeated application of brakes, pedal becomes very hard and requires much pressure to make vehicle stop, in reverse grinding is also heard. Mechanic says belt driven vacuum pump may be defective, other complaints and bulletins are stating all components must be replaced, I would think a $58000 truck should last more than 64K miles before needing all the major brake components changed. If you don't have very strong legs when this happens you are going to crash..should be a recall
Tried to stop tuck when parking. Brakes were extremely hard and truck came to a slow stop while I was mashing the breaks with all my might. There was break fluid all around right front tire. Dealership found engine oil in vacuum line of vacuum pump due to valve stuck in pump causing hard brake pedal. Replaced vacuum pump, pipe, brake booster and master cylinder, fluid.
Coming to a stop in a parking lot the brake pedal became very hard and would not stop the forward motion of the truck. The truck hit the curb stopping its forward motion. No damage to the the truck. I had the problem diagnosed as a bad brake vac pump. The pump was replaced for $496. The truck only had 26000 miles, I have told that this is not that uncommon.
Hard brake pedal at low speeds causing the truck to not stop. Dealership says a full brake system replacement is needed. I've serached online and there are several people having this same issue. It seems to be very common, but nothing is being done about it by GMC.
- Hendersonville, TN, USA
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2014 GMC Sierra 1500 denali pick-up truck with 67,900 miles: Experienced complete loss of power brakes in stop-N-go traffic situation on highway. Problem started as an rare issue that would correct itself and progressively got worse over a week's time. Issue occurred when in traffic requiring frequent stop-N-go braking. Brake pedal went completely to the floor and stopping distances dramatically increased. Had no way to manually apply the brakes to get them fully engaged. Ultimately forced to shift into neutral and apply parking brake to stop. Subsequently found GM bulletin #pit5361B referring to other customer problems with weak vacuum at brake booster. That problem was confirmed and diagnosed by my automotive professional. Ended up having to replace brake master cylinder, vacuum booster, vacuum pump, vacuum tube/pipe and 2 serpentine belts for a grand total of $1626 in repair work (similar amount to the others I found who experienced this issue). Talked to my GMC dealer who confirmed that this is a recognized issue that hasn't yet risen to the level of a "safety recall". however, I was told "stay tuned" because they wouldn't be surprised if a recall on the power brake system was right around the corner.
Had the recall for the low maneuver turning issue performed at a dealership when I had my oil changed on August 15, 2017. Less than a week later the issue occurred when turning into the driveway and dealership will not honor my complaint to fix it. The statement I hear is "we can't duplicate the problem" but I'm telling them it happened. Either the procedure to rectify the recall isn't working or they didn't perform it correctly. I need help.
Rounding a corner at low speed and the A/C compressor locked up and stalled the engine. I lost steering and brakes nearly hit a pole. Search for this issue and you will see that GM has a known issue on the 2014 A/C units that they are doing nothing about
Takata recall. Driving through the smoky mountains brake pedal went all the way to the floor and didnt stop. I released pedal and pressed again and it was very firm and hard to get the truck to slow down/ stop. When this occurred the system showed no signs of system failing. If was a very scary situation with having my family in the truck with me. Im very thankful that it didnt end a lot worse like it could have. All in all I drove 4 hours to gatlinburg with no signs of issues and for it to just go out without a warning something needs to be done.
The contact owns a 2014 GMC Sierra 1500. While driving 15 mph, the brake pedal was depressed upon coming to a red light but failed to respond without warning. The contact was able to stop the vehicle after downshifting and depressing the brake pedal. The vehicle was towed to a dealer where it was diagnosed that the brake assist failed and needed to be repaired. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 34,000. The VIN was not available.
Intermittently, when applying the brakes to stop for a red light, the engine wants to keep the vehicle going at the same speed and fights the brake so the vehicle cannot stop. Shifting the gear shift into neutral allows the brakes to work but the engine RPM revs up to 2500 RPM for about 15 seconds before dropping to idle. If the driver didn't apply the brakes hard enough or shift into neutral, the vehicle would overpower the brakes and drive into anything ahead. Analogy: It acts as if the cruise control was on (and it's not) and tried to keep the same forward speed no matter the brake application. Dealer cannot reproduce the problem, no alert warning light. Some times, going at highway speed, taking foot off accelerator and expecting vehicle to start slowing down, it stays at same speed for about 15 seconds before dropping rpms. This has been happening, intermittently, for a few months.
The contact owns a 2014 GMC Sierra 1500. The contact stated that while driving at 65 mph, the contact attempted to depress the brake pedal but it failed to respond. The contact had to apply extreme force to the brake pedal and shift the gear shifter into neutral in order to get the vehicle to stop. The vehicle was taken to a dealer, who diagnosed that the brake booster needed to be replaced. The vehicle was repaired. The manufacturer was notified of the failure. The failure mileage was 153,758.
Due to a problem with brake booster vacuum sensor and brake booster large vacuum leak, extra pressure is needed to apply brakes. Brakes are essentially non existent in vehicle. Problem diagnosed by dealer. Dealer states this is not a normal problem with the braking system. This is a safety issue especially when driving and this unexpectedly happens. Vehicle was in motion when this happened driving at approximately 45 mph. I understand this was a similar problem with the 2014 Malibu. Replacement parts are on order unknown when expected due to this not being a part regularly replaced (per dealer).
The contact owns a 2014 GMC Sierra 1500. The contact stated that while driving at approximately 20 mph, the steering wheel seized and veered independently. In addition, several unknown warning indicators illuminated. The contact was able to regain control after depressing the brake pedal. The failure recurred and the stability trac, and the service trailer brake warning light illuminated. The vehicle was taken to the dealer where it was diagnosed that a excessive voltage drop resulted in a loss of power with the manual trailer brake, the BCM, electronic BCM, ECM, steering. The vehicle was repaired. The manufacturer was made aware of the failure. The failure mileage was 27,416.
A D V E R T I S E M E N T S
- Scituate, MA, USA