Trailer Brake System, needs service light keeps coming on. Have had this issue with this vehicle since I purchased new in 2015. Have had this issue checked by dealer several times and they always tell me unable to duplicate customers issue on my service invoice. The service light will come on and an audible alert will sound for a few seconds and then go off and come back on. Apparently this is an ongoing issue with GM products, have talked to other Chevrolet owners who have experienced same issue and several GM forums have this issue as a priority topic.

- Cynthiana, KY, USA

2015 Chevy Silverado LTZ 5.3L. 81.2k miles. After not driving the vehicle for four days while away on a work trip, the very first trip out of the garage, the brakes became extremely difficult to press and stop. Originally, it occurred at low speeds, but it persists at all speeds now.

- Billings, MT, USA

Low speed braking. No warning lamps or messages. When creeping forward and then applying brake boost is lost. Intermittent so the driver may not be able to anticipate when braking will change.

- Jericho, VT, USA

Randomly the brakes get stiff, even while on a hill or stop and go traffic. I noticed the first time after first buying it that while on an exit driveway at a decline, the brakes felt like they slipped or went away. I had to push them hard all the way down and thought I was going to roll into oncoming traffic. The truck soon after was making a noise and felt like it was losing power and revving after the keg was taken out and loss of gas mileage. The dealership confirmed the brakes vacuum pump and the high pressure fuel pump were both bad and the gas was leaking into the oil causing problems and possibly ruining the engine, they stated both would need to be replaced. Check engine light comes on soon after fresh oil changes everytime and codes were shown on computer for running rich. No codes after the initial oil changes due to the warning lights appearing after a good amount of gas has leaked into the oil.

- Tallahassee, FL, USA

I recently brought my 2015 Silverado in to the local dealership to fix the -??increased brake pedal effort-?? recall. The dealership reprogrammed the brake control module but the problem still persists. Yesterday 03/07/23 I experienced loss of brake power in interstate traffic while traveling at low speed. This happened several times and it is very concerning. I believe the GM vacuum pump is faulty and I will contact the dealership about replacing it.

- San Marcos, TX, USA

I was backing up at low speed after a 25 minute drive and went to stop, pushed brake pedal and it was hard and didn-??t slow the vehicle. I stood on the pedal to stop from backing through my garage door and wheels made a dragging sound and stopped. Put it in drive to check the brakes and same thing happed, brakes hard and no stopping power. Put truck in park and shut it off. Started it back up and brakes were fine.

- Cave City, KY, USA

Hard brake petal at low speed when I'm trying to park vehicle, dealership kept truck for five days, service Rep said, he couldn't get to my truck, . I picked up my truck and I took it to another Dealership they claimed that my brakes problem was completed, Matick Chevrolet Jan 6, 2023. Problem #,2 High Pressure Fuel pump needs replacing as per Matick Chevrolet inspection on 1/6/2023 their Mechanic inspected my truck, I have their invoice stating that and two more invoices from, one from Pep Boy's diagnosed bad Fuel pump and another invoice from Good Year Tires diagnosing bad High Pressure Fuel pump is bad with 45 psi. Pep Boy's also diagnosed my Brakes Vacuum Booster Pump needs replacing and remove and replace another Brake Booster vacuum pump and they listed two different parts numbers, #3 my Electrical System causes my dashboard monitor to jump back and forth all crazy, and anti theft warning, Traction Control System Warning on constantly Please help me to get these problems resolved contact Les Stanford Chevrolet Dealership in Dearborn, Michigan and Matick Chevrolet in Livonia Michigan, they charged me 300 Dollars just to check out my Recall Order and told me it would cost me 3000 Dollars for them to repair my Recalls, Please Help [XXX] INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).

- Detroit , MI, USA

Inability to brake at low speeds. Brake vacuum pump failing at 100K miles. I can submit photos and report later.

- Chandler, AZ, USA

While driving at low speeds (approx 5-10 mph) the brake pedal became stiff and very difficult to stop. This issue happened with no prior warning or indication of the issue. As a result of this issue severe damage to personal property housing and vehicles was nearly missed. Upon research this has been a common issue for GM vehicles specifically trucks and SUVs.

- Bakersfield, CA, USA

Anytime I pull into the parking lot and I have to pump my brakes more than once the brake pedal stiffens up and the truck does not stop it has almost caused a collision and almost went through the window of a business it is to the point where every single time I drive it does this from what I heard it is the vacuum pump it does not provide enough vacuum for the brake booster so the brakes do not work it cost about $250 for the OEM part and that is not guaranteed to work the problem will persist later on down the road after more mileage put on the truck

- Grantsville , UT, USA

I constantly get a trailer assist brake service warning dinging. I have video. I paid for a tech to fix it but it still dings. I fear the brakes will be affected since it says "Service Trailer Brake System." System has not been inspected by Dealer because they told me it could take 6 months to get it in due to high volume of repairs on books and low inventory. This started in 2021 and stopped after I paid a tech to fix it for about 6 months but started repeating the problem again in 2022.

- Memphis, TN, USA

At slow speeds the brake pedal gets hard and does not stop vehicle. At random times I temporarily lose power steering and vehicle is hard to turn.

- Fort Worth, TX, USA

Losing power brakes at low speeds. Narrowly avoided rear-end collision.

- Colorado Springs, CO, USA

The vacuum in the braking system failed and would not stop the vehicle especially after going over 1500 rpm the vehicle would stop, but if you had to brake without being able to go above 1500rpm the brakes failed. You had yo put a lot of pressure on the brake pedal to slow it down and stop. When you have a hill to go down it could be very dangerous. Taking the vehicle on 11/15/22 to Kendall Chev I'm Marysville, WA. No warnings were given on brake problem. Since truck will not stop normally, any person, vehicle, bike, etc is in danger of being in front of truck because of brakes failing.

- Granite Falls, WA, USA

The contact owns a 2015 Chevrolet Silverado 1500. The contact stated while driving 45 MPH, he heard an abnormal noise coming from the vehicle. The contact stated no warning light was illuminated. The contact stated that he continued driving to his residence. The contact stated while leaving the driveway, he continued to hear the abnormal noise, and the service brake warning light illuminated. The contact took the vehicle to the local dealer, where it was diagnosed with needing the brake vacuum pump to be replaced. The vehicle was not repaired. Upon investigation, the contact associated the failure with NHTSA Campaign Number: 18V578000 (Service Brakes, Hydraulic) however, the VIN was not included. The manufacturer had not been informed of the failure. The failure mileage was approximately 106,000.

- Matawan, NJ, USA

Trailer brake assist warning keeps going off at different times with no trailer attached. Quite annoying and unsafe distraction.

- Stevens Point, WI, USA

This is a 2015 Chevy Silverado, I continuously get a message reading "Service: Trailer Brake System". This error message would continuously chime every 5 seconds, no matter if I cleared the message with the check button on the steering wheel or left it on. This chime would override the radio, phone calls, turn signal chime and any other noises put out by the vehicle in addition to covering the digital speedometer readout. I have yet to take it to a dealership as today was the first repetitive issue lasting over 30 minutes. I first noticed this at random over the last 2 months, but these messages would stop after 2-5 minutes worth of chimes. I plan to take this to a dealer for inspection, but wanted to check for recalls/ report the issue before doing so.

- Severn, MD, USA

The service trailer brake system warning keeps appearing while driving without a trailer and with a trailer attached to the truck. There is a defective wire harness located on the left side of the steering wheel that needs replaced to fix the issue. The warning alert appears and dings while driving causing distractions while driving down the road.

- Fort Wayne , IN, USA

Trailer brake system I have owned this Chevy Silverado 2015 since 2018 when I purchased it certified from a used car dealership in upstate New York. About one year into owning the vehicle I started to experience an alarm that was flash trailer brake system. This alarm would beep and flash in my center consul restricting me from sight distracting me from driving and is almost impossible to drive the car without distraction. I checked YouTube I called the manufacture I did so much to figure out what was going on and why this was happening considering I do not show any thing I did not understand why the trailer brake would cause such a problem considering I never told anything.After about three months of driving the car this trailer brake system alarm stopped. Now recently 2022 the trailer break system alarm is back and flashes nonstop and is relentless. I cannot listen to music I cannot hear my own self think the alarm is so loud and so distracting I would rather walk to the store then drive the truck I am forced to drive this truck because of the fact that I need to get to work but the safety hazards that are now limiting me and I am afraid this is going to cause a major accident or loss of life. I recently discovered that this is a manufacturers wire harness malfunction due to faulty wiring and a low-grade wire harness system. Before this gets any worse I need some sort of help. Knowing that it is impossible to fix without thousands of dollars being spent and finding a specific electrical auto technician to fix it it is nearly impossible to have this fixed Chevy refuses to even acknowledge there is a problem I need someone to please help me and the other Chevy Silverado owners to get this under recall so that these wire harnesses can be replaced please help us my name is [XXX] my address [XXX] [XXX] is my cell phone number INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).

- Emerson, NJ, USA

Trailer brake system alarm keeps going off.

- Stevens Point, WI, USA