Why did my brakes lock out on ice and all I could was slide.

Have your ABS checked. For future reference when you're in a dead slide like that let off the brakes, at least with your wheels spinning you have some hope of regaining traction.

ABS cannot create traction when there is none such as on glare ice. I think you need better tires such as Blizzaks.

Thank you all very much. My van is going into the dealer tomorrow for a check up.