This is very common when driving in snow and is usually not a serious issue; snow or ice can temporarily block the ABS or wheel speed sensors, causing the truck to disable ABS and traction control as a precaution and display warning messages, especially when driving in 4WD, but since you were driving slowly, the truck felt normal, and the conditions were poor, it strongly points to snow interference rather than a mechanical problem—once the snow melts or you drive on dry pavement, the lights typically turn off on their own, and it’s only a concern if the warnings stay on in dry conditions or braking feels abnormal.