that's a loaded question.You know with all of this information about delays for the 6.2's I wonder if that's why they cost so much so maybe if the dealer ends up putting a 5.3 in it it would be a lot less. There was a statement made that if I put a 6.6 in it which I believe is the same engine just bored out differently, it would not be covered under warranty because it's not the correct engine for the vehicle. I wonder if that would be the same thing for the 5.3 considering it originally had a 6.2.
any dealer offered warranty no matter what you choose needs to be looked over and be sure it is a gm warranty (nationwide) and not a "dealer" warranty where you have to take it to them. otherwise 3rd party options with a warranty say from fraser, there warranty "should" cover engine failure and parts/labor, (nationwide) the catch is there payout for labor is a pro-rated amount, so any warranty work would need to be agreed upon by a shop at the pro-rated amount, so say a shop normally charges 160hr, the warranty coverage may only pay 110hr and normally "most" shops will agree to it, but may not. in which case you could either take it somewhere else or pay the difference out of pocket.
in any case read the fine print......