How do I know if my truck has ABS?

I have a 93 chevy C2500 3/4 ton with the 350 5.7 liter in it under vehicle specs it says power brake: Yes but says nothing about ABS. My dash inside the truck where the speedometer tach ect. is when you turn the key on but don't start it and all the lights come on the battery symbol check engine light and (ABS) light comes on they all turnoff when you start the truck of course but how can I make sure I have ABS