General Motors complaint: 2021 5.3 Engine issue

I purchased a beautiful 2021 Silvarado SRT Pickup. A beautiful truck. On Thursday December 16, 2021 the truck would not start with the remote start. So I started it manually only to have the engine sound horrible. It made lots of noises, and lots of warning lights on the instrument panel. I then received text messages. I had an appointment so I started to work not knowing if I would make it. Thank goodness I did. I spoke to Feldman Chevrolet, Novi Service Department at 8:30ish am and they stated to bring the truck right in. I did and was told that there is an issue with this yearmotors lifters and I would have to leave my truck. There were no Courtesy Vehicles so was set up through Hertz with a rental. Now understanding I have financed over $50,000 truck and the only vehicle available is a standard Equinox, but it would get me to work.
It is now 2 weeks later and my truck is supposed to be ready tomorrow afternoon. I have made my monthly payment, Onstar and Sirus radio all due to the fact GM has used faulty Lifters. I truly understand that you require your suppliers to a higher quality standard but GM doesn’t hold themselves to that same standard. So truly disappointed.
I have made certain to talk to other people about the poor quality of parts on this engine. This is because I have always been so proud of driving a GM Product.
I did call a Customer Service Rep for GM and the woman was rude and told me it was the dealerships responsibility. It is the dealerships responsibility to repair but it is GM’s fault for using faulty parts.