Sorry Hak, you are wrong, only O'Reilly's has those sensors.Keep in mind, I am bias, for I do work at O'Reilly's. This post is actually brought to you via the O'Reilly's shitter. HahaI will post the part number after I am finished. Lol
If you have an oreillys near you there BWD line map sensor is a gm one in a BWD box for cheap. Mine came out of the box with the GM sticker and part number right on it. I think it was 69.00 dollars for the 3bar