2018 Chevrolet Silverado 1500

ABS warning light came on and brakes starting acting strange. The brake pedal was soft and was hard to depress. I took it to dealer and they checked codes and comfirmed the vehicle has serval codes. They cleared all codes and started the engine. Immediately the ABS warning came on. I am very concenedn about family, I just purchased the truck on Jan 21, 2026. Please help!!

To Whom It May Concern, Below is my support statement regarding recurring safety and reliability issues observed in the vehicle over an extended period: 1. Sensor Malfunction and Resulting Damage The front and rear proximity sensors exhibit repeated failures. During reversing, the system issues false warnings when no obstruction is present. Conversely, while driving forward, the system fails to provide warnings when approaching walls, sidewalks, or other fixed objects. These failures have directly contributed to multiple instances of exterior damage, including impact with hard surfaces, as well as damage to tires and rims. 2. Warning System Deficiencies The engine warning system has proven unreliable. Significant oil leaks occurred without any corresponding check engine notification. On separate occasions, the check engine light illuminated briefly before extinguishing without resolution. 3. Diagnostic Inconsistencies Independent diagnostic inspections identified multiple ECM fault codes. However, upon subsequent service visits, these codes were cleared or dismissed without adequate explanation, creating uncertainty regarding the vehicle’s underlying condition. 4. Excessive Repair History Despite Limited Use Over the past several years, the vehicle has required multiple costly repairs despite being operated only for routine transportation. It has not been utilized in off-road conditions or to its full 4x4 capacity, yet has demonstrated significant and repeated mechanical deficiencies. The issues experienced indicate systemic failures in critical safety systems, monitoring functions, and diagnostic reliability. These unresolved defects have resulted in repeated safety risks, physical damage, and disproportionate maintenance requirements

While vehicle is in motion the brake system will automatically start to lock up the brakes and then the stabilitrak light will light up on the dash. As well as if cruise control was set to whatever speed the brakes at some point will begin to slowly lock up causing cruise control to disengage and stabilitrak light will turn on. Relating to: NHTSA CAMPAIGN ID: 20V603000 GM's number for this recall is N202300860.

The following Recalls were found on Kelly bluebook, that matched the issues I have been having with my vehicle perfectly. When calling the recall center, they stated my vehicle year 2018 Chevy Silverado and serial number were not listed for this but it's the exact diagnosis of what I'm experiencing. The Unintended activation of the driveline-protection system will cause unintended braking on the wheel on the opposite side of the failed sensor, causing the vehicle to pull to one side unexpectedly, increasing the risk of a crash. As the vacuum level drops, the brake assists decrease, increasing braking effort, extending the distance required to stop the vehicle, thereby increasing the risk of a crash. A decrease in brake assist can increase the brake pedal effort and distance required to stop the vehicle, increasing the risk of a crash. What component or system failed or malfunctioned, and is it available for inspection upon request? The brakes inflate on their own as if someone is pressing them down while driving. The vehicle begins to jerk horribly causing the inability to steer or maintain control of the vehicle or the ability to stop. Has the problem been reproduced or confirmed by a dealer or independent service center? Yes How was your safety or the safety of others put at risk? This is very dangerous. I have no control over the speed of the vehicle or if the brakes will fail, or if the brakes will burn up due to fighting with the accelerator while driving. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? Yes, the manufacturer inspected it and stated they could fix the issues, paid but then the same malfunction kept happening even after payment and supposedly being fixed. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? None related to the issues, Stabilitrak warning and then random hill assist to inflate the brake vacuum

On 10/03/21 at approximately 1251 hours, I was driving my 2018 Chevrolet Silverado which is the vehicle with the above mentioned VIN. As I was traveling towards a heavily traveled intersection in my current city, I approached a steady red signal on the traffic light. It should be noted that this particular part of the roadway is a slight decline towards the intersection and traffic control signal. It should also be noted that on this particular day, there were no inclement weather or roadway conditions that would affect the vehicle to deviate from normal maneuvering. As I applied the brakes at a reasonable distance from the stop light, almost all pressure and power towards braking was lost. As a result, I was forced to apply extensive pressure to the brake pedal as the vehicle failed to slow and stop in a timely fashion. After gaining some braking power, the vehicle and brakes began to shake and produce a clunking sound. This was troublesome because had I failed to stop in a timely manner, I or other motorists could have suffered serious injury or death as a result of a crash at a heavily traveled intersection. Prior to this incident, there were no warnings or alerts provided by the vehicle, dealer, or manufacturer about this issue. As the event occurred, an alert flashed on my dashboard that read “Service Brake Assist.” Following the incident, my vehicle was inspected by a certified mechanic. Said mechanic deemed that the problem with the braking was a result of a failure of the brake booster vacuum system. After doing some research, it is apparent that other years, makes, and models of GMC products suffered the same issue with the braking system. Said issues were remediated with a recall by the manufacturer. This defect also caused numerous vehicle crashes with reported injuries.

ABS (TRAILER BRAKING SYSTEM) AND STABITRAK WARNING LIGHTS RANDOMLY COME ON WHILE DRIVING AND REMAIN ON UNTIL VEHICLE TURNS OFF. ON MULTIPLE OCCASIONS THE REAR WHEELS HAVE LOCKED AND STEERING BECOMES DIFFICULT EVEN WHEN BRAKES ARE NOT BEING APPLIED. THIS HAS OCCURRED WHILE DRIVING AT VARYING SPEEDS AND IN VARYING WEATHER CONDITIONS. VEHICLE HAS BEEN CHECKED BY DEALER ON 3 SEPARATE OCCASIONS FOR THIS AND SERVICE WAS REPORTED UNABLE ONCE LIGHTS HAVE GONE OFF. SAID INCIDENT HAS OCCURRED APPROXIMATELY 30-50 TIMES OVER THE PAST 18MONTHS.

HEARING UNUSUAL POWERTRAIN WINNING , LUGGING ON A HILL TO THE POINT OF SHUTTERING BEFORE IT DOWNSHIFTS, AND THEN VERY HARSH SHIFT. VERY HARSH SHIFT FROM FIRST TO SECOND GEARS, AND THEN AGAIN ON DOWNSHIFT FROM SECOND TO FIRST. TODAY 11/19/2020 I HAD THE CRUISE CONTROL SET AT 70 MPH, AND ONCE IT STARTED LUGGING DOWN IT DOWNSHIFTED AND TOOK OFF LIKE THE ENGINE KEPT RUNNING WILD. I TAPPED THE BRAKE PEDAL TO CANCEL THE CRUSE CONTROL, THE BRAKE PEDAL HAD NO EFFECT IN CANCELING THE CRUSE THIS VEHICLE JUST KEPT RUNNING WILD. I EVEN PUSHED THE MAIN CRUISE POWER BUTTON ON THE STEERING WHEEL FOE WHAT SEEMED LIKE AN ETERNITY, STILL RUN AS IF IT WAS POSSESSED. AFTER ABOUT 45 SECONDS, AND JUST AS I MADE UP MY MIND THAT I HAD TO KILL THE IGNITION SWITCH, IT CALMED BACK DOWN TO THE NORMAL HARSH SHIFT, BUT DIDN'T RUN WILD. I ALSO NOTICED THAT THE ENGINE RPM'S GAUGE IS NOT STEADY, AND MOVES RADICALLY I HAVE CONTACTED MY LOCAL DEALER IN THE PAST WITH MY CONCERNS OF A HARSH SHIFT ISSUE, AS WELL AS THE SHUTTERING AND LUGING DOWN ON THE HILLS, AND THEY ASSURED ME THAT THEY HAVEN'T HAD ANY ISSUES WITH THEIR TRANSMISSION. THESE TRUCKS NEED TO BE LOOKED AT VERY CLOSELY BEFORE SOMEONE HAS A CATASTROPHIC ACCIDENT. I HAVE AN APPOINTMENT ON THE 5 OF DECEMBER 2020, AND YOU WOULD THINK WITH THE SAFETY FACTOR OF MY CONCERNS, THAT THEY WOULD TRY GETTING ME IN SOONER, RATHER THEN PUT ME OFF OVER TWO WEEKS.