Barometric pressure sensor

[eaglehawk]

I am trying to find out some more information on my bps. I dont need to know how it works, but the values that I should see in DC volts. I have the stand alone bps on this truck but I have a DAC3 pcm from a 2000 SD instead of the original AWA1.

What voltage should I see from the bps at 500 feet above sea level?

negative value or positive?

Does the DAC3 have a built in bps?

If the DAC3 has a built in bps, How do I bypass the stand alone bps?