NHTSA Complaint #11695966 — 2020 CHEVROLET SILVERADO 1500

my 2020 High Country Deluxe 6.2 L87 GM Motor: At Every Cold startup, the engine sound is erratic and sounds like metal on metal for internal combustion for approximately 2 seconds until the newly designed two-stage, variable displacement vane-type pump oil sump pump. The biggest issue that I have with this design is, with a 2 stage pump, depending on the engine rpm, according to GM is Possible lower psi to pump the oil to the top end Valve assembly. In addition, the OW/20 oil IMHO is too thin and does not have the Viscosity to lubricate the motor properly. GM Fix (for 2021 -2024 L87 6.2 motors was to change the viscosity to 5W/30 Supercar Synthetic oil, add a leaf to the owners manual to dictate the oil viscosity change and changing the oil cap from 0W/20 to 5W30. 10-speed Hydra-Matic 10L80: Hard upshifts and downshifts intermittently and confusion of proper gears. There is a TSB regarding this specific Valve Body and torque converter issues. Finally: When deactivating DFM Random cylinders as needed by ECM-TCM-BCM, the lifters are staying in the collapsed state and cant return to full height resulting in bent push rods, rocker arm damage, Camshaft damage, crankshaft damage and Catastrophic engine Failure. It now seems that NHTSA has issued a New Federal Probe into the remaining 2019-2021 L87 6.2 motors.