2021 CHEVROLET EXPRESS Service Brakes Problems

This is a Forest River Sunseeker Motorhome on a 2021 Chevrolet Express chasis. On Friday, [XXX], after being in stop and go traffic for 10-15 minutes on [XXX] driving at 65 mph, a smell of burning brakes started filling up the motorhome. Then the vehicle started to wobble and the ABS light came on. Pulled over to the side and while applying brakes the vehicle shook/wobbled. Drove to a NTB tire store and the manager indicated it was not the tires but smelled like the brakes burning and advised not to drive it. Had it towed to Monument Chevrolet and they reported they could not replicate the problem. No repair. On [XXX] after numerous trips in RV, the exact same thing occurred. This time drove it to Monument Chevrolet with dash lights on: ABS, brakes, etc. and demanded a repair. They replaced left front speed sensor for $406.00. On [XXX],...