Abs not working

I have a 2000 Gmc Sierra and I recently noticed my abs was not working, and my abs light is not on. I went to buddy's house and hooked my truck up to a tech 2 computer and its pulling a code. It says the pump is stuck open. To get back to light issue, I replaced the gauges when I bought the truck 2 years ago cause the temp gauge was not working. I've checked the dash lights in the gauge itself, all the fuses, and also put the old set of gauges back in the truck to see if the light would come on and it didnt. With the new gauges in it now, when you turn the key to the on position you get no abs light or air bag light. Please help

As far as the ABS not working, you've found the problem. Replace the pump.

For the light not working, is it being turned on by the PCM? I'm pretty sure you can check the bulb status with the Tech-2. That will at least let you know if the PCM is trying to illuminate the light. I'm not sure about your vehicle specifically, but some codes don't turn the light on. There are lots of vehicles with inop. ABS that don't have the light on.

When we ran the tech 2 on it, it is saying the light is illuminated. So we tried to turn it off and back on and it did nothing. Thank u so much for your help and I will post when I get it figured out. If you think of anything else please post.