Oil Pump problems of the 2007 Chevrolet Silverado 1500

My issue is with the oil pressure in my 2007 chevy Silverado 1500 4x4. The low oil pressure light comes on and I can hear the lifters tapping. I got online and there are thousands of complaints on this same issue. It appears to be a problem with either a defective oil pump or a screen in the oil pressure sensor clogging. This issue needs to be recalled because it effects literally thousands of people.

2007 Chevrolet Silverado 1500 5. 3l engine. At 40,000 miles, the camshaft and a couple of lifters were replaced due to wear and eventual tapping. Again at 90,000 miles, the camshaft and a couple of lifters (lobe 4) were replaced due to lifter wear and breakage causing engine tapping. On the second occurrence, after the lifters had started tapping (and 900 miles from home) a piece of a lifter broke off and caught in the oil pump causing it to stop. I quickly turned off the engine to avoid further damage. Upon this second occurrence of lifter failure causing the camshaft to wear, I felt sure that Chevrolet and gm would replace the engine with a short block but I was extremely disappointed. Gm and the Chevrolet dealer admitted that a camshaft should last as long as the vehicle but I am on my 3rd camshaft in this engine before the warranty ended. One tried to convince me the camshaft was probably of a bad lot made but these 2 occurrences were too far apart for me to believe that a recall would not have occurred during that time. The other (gm) tried to convince me that the camshaft wore out the lifter but I don't buy that excuse either. A new set of tires lasted longer than the engine on both occurrences. I believe the problem is still there. I still have the defective engine block in my vehicle which causes me to doubt the engine dependability and will cause a reduction of the value of my vehicle when it is time to sell or trade.