2015 GMC Sierra Denali-catastrophic fuel pump failure

I had an 02 Duramax and when my injectors went out GM offered 0 help. I was out of the extended warranty by 2 months and at 180,000 miles. After fixing it I keep the truck for another 85,000 miles, and the last time I talked to the guy who bought it he said it was at 360,000 on the same ones.
As mad as I was at the time I still have a Duramax and would not hesitate to get another.
Now the dealer who told me twice the injectors were good, I’ll never buy from them.