Today our GX 550 OT+ brakes felt weird as we left the house. Had to apply much more pressure to get the brake to engage. After about a 10 mile commute it became much worse barely stopping the vehicle. A warning came up stating "Power Brake Low, Safely stop the vehicle and call dealer", paired with a constant chime that wouldn't shut off. A brake light indicator also came up in the cluster. Luckily, I was able to get right into the dealer and they are currently looking at it. This vehicle just has a 15K scheduled maintenance/inspection last week. All fluids topped, and brakes pads had plenty of pad left. Anyone else experience this issue yet? Much appreciated.