Hey guys, just wanted to give you an update.
MY PROBLEM: The vehicle would start and idle no problem. Driving seemed fine, when I stopped the truck it would drop in RPM's and the heads up display would flash OIL PRESSURE LOW and then die out. It would restart with no issues. So After looking and looking and testing and testing here are my results and my fix.
MY FIX: I swapped out the Cam-shaft positioning sensor. This may seem odd to some but guess what! It worked. I spent $34.99 and about 5 minutes of removal and installation.
Good luck to you all if you have the same issue!
2002 Chevrolet Trailblazer LT 168,000 miles.