First off, any help you can offer is greatly appreciated.

Well I just changed out my rear knock sensor and broke the infamous oil pressure sending unit when taking out the intake. I needed the car up and running for the drive to Gatlinburg tomorrow morning so I tryed to fix it the quick and easy way and JB welded the thing back in place. I started the car and everything runs normal but the oil pressure gauge reads a constant 90psi and never flinches (maxed out). I've heard if the OP sending unit was broken then it would read 0 pressure and not really be a problem other than it wouldnt work. Now that I see mine is maxed out it got me worried. What could be the problem? I'm not worried about the gauge not working for the drive to Gatlinburg, but is everything else still in safe operating condition? I even checked to see if it threw a code, but it passed showing nothing wrong.

 

actually the "check gauges" light is not on

 

I have seen it go both ways, either pegged or flat lined.

My buddies C5 broke the sensor or had it go bad, and was reading 130psi of oil pressure. Replaced sensor and right back to 40psi where it belongs.

 

Pretty common in C5s.

Turn the ignition on without starting the car. Your oil pressure should be 0. If it isn't, then it's the sensor.