Pat, the truck is a flood salvage. The CP3 was diagnosed at the dealer so he brought it to me and told me to replace the pump. I insisted that we remove the pump and injectors to have them tested by a bosch dealer but he wasn't having it, told me that was a waste of money and he had plenty of pumps laying around. The passenger bank is putting out over 30mL and the drivers side is putting out over 20mL. GM spec calls for 12mL per side. I also tested the FRPR and the return side for air, both came out okay. I pleaded with the man to do this the right way but he wasn't having it.
Simply put, the way he demanded the job to be done doesn't allow one to properly diagnose which part was bad and how bad was it. I have no way of knowing if the pump was bad/good, the regulator was bad/good or if one or all injectors were bad/good. I don't know about all of you but I can't diagnose parts with unknown condition used parts or without the bosch test stands. Using the scan tool only does so much and with the pressures I was seeing, it could have been all of the above in any order.