2018 Chevrolet Silverado 1500

The contact owns a 2018 Chevrolet Silverado 1500. The contact was alerted by OnStar of a failure with the stability system. While the contact’s husband was driving 45 MPH, the vehicle was jerking; the brakes were sticking while the brake pedal was depressed. The failure persisted while driving 50 MPH. The driver used the back roads while driving to the residence. The brakes and ABS warning lights were flashing quickly. The vehicle was taken to AutoZone, and DTC: U0422, was retrieved. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was contacted and confirmed that the VIN was not included in NHTSA Campaign Number: 19V761000 (Service Brakes, Hydraulic, Service Brakes, Electronic Stability Control (ESC); and referred the contact to the NHTSA Hotline to report the failure. The approximate failure mileage was 113,000.

Purchased used 6/12/2026 at 188,882 miles from a franchised Chevrolet dealer. The integrated trailer brake system master fuse and passenger-side turn signal fuse were blown at delivery. When the fuses were replaced, the trailer brake system faulted and the failure disabled the ABS, traction control, and StabiliTrak (electronic stability control). Significant safety concern: with the master fuse blown/open, the vehicle displays NO warning messages of any kind — the safety-system failure is completely masked while trailer braking is inoperative. The warning cascade only appears when a good fuse is installed and the faulted circuit is energized. Separately, at approximately 12 days and ~1,700 miles after purchase, the engine began knocking and set diagnostic trouble codes; a dealer repair order dated 7/6/2026 documents the knocking complaint with no work performed. The vehicle is currently parked as unsafe to drive. No crash, injury, or fire. Reporting so the ABS/ESC failure mode — and particularly its masking behavior when the fuse is open — is on record for this VIN and vehicle line.

Vehicle was determined to be unsafe to operate per inspection performed by Mike Maroone Chevrolet on 8/26/24 immediately after I purchased from Rocky Mountain Auto Brokers in Colorado Springs on 8/8/26. It was discovered by customer immediately after sale that bank 2 catalytic converter was restricted internally (after Rocky Mountain failed to correctly diagnose and repair 3 times before and after purchase). Customer discovered emissions warranty extension and took to Maroone Chevrolet. After warranty repair inspection of vehicle determined it was not safe for customer to pick up and drive vehicle and generated a report and video showing front suspension damage so loose that could cause crash and vehicle was towed back to Rocky Mountain for repairs. Rocky Mountain has failed to provide any documentation on these repairs and many subsequent repairs including transmission replacement after many written requests. Customer cannot verify if vehicle repairs brought vehicle back to a safe condition. Almost anll repairs by Rocky Mountain has failed resulting in missing bolts, bolts falling out after transmission replacement As well as failure of many CV Axel replacements documented in their own records. Extended Warranty Company also refuses to provide documentation of transmission replacement after they supplied the part (transmission) to Rocky Mountain for installation. Customer cannot verify if in fact transmission was replaced as it was painted black. Any warranty on replaced transmission cannot be verified and they also have refused to provide documentation or serial number verifying same after many written requests. Customer would like to submit a detailed letter and safety inspection report with further info and details in addition to this online form complaint as this is a complex case and additional info will further prove up these allegations. Some documents provided by Rocky Mountain are inconsistent with customer complaints and do not reflect accurate info.

Parking brake pad failure has occurred twice. Last month at 31,668 mi, truck was taken in for servicing a warning light due to TPM failure (all replaced), and I asked for parking brake inspection because I was pushing pedal to the floor in order to engage. Mechanic said "Left rear prkg brake shoe has section missing." He had never seen that before and I exclaimed that it happened first in Apr 2021 at 18,770 mi. I am not sure which side it was since it was not written on the service invoice, but I suspect the right side because during a Nov 2021 oil change the invoice included "adjusted rear rh parking brake." OEM replacement pads were installed both times. I have the latest failed pad which shows about 2 in of material missing from the shoe substrate, not the 2021. Kearny Mesa Chevy repaired this in 2021; Walt's Danville Service in 2026. No safety issue, but could have been a problem in event of brake failure an need to stop vehicle by applying parking brake that would not hold. I asked KMChevy if this should be a warranty repair or a recall issue and they refused to consider in 2021. It cannot be coincidence that this happened to Chevy OEM equipment, I suspect to both sides. I paid ~$500 each time and feel that Chevy corporate should compensate me.

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!!

When attempting to stop, the brakes were rock hard and would barley compress. Almost crashed into the car in front of me. Brake booster was replaced a month ago by dealer, but still is losing vacuum. No codes are being thrown, so any reasonable driver would assume everything is fine with the vehicle. It is going to get someone killed.