In my personal experience (99 suburban 6.2l 383) AC Delco spark plugs are the way to go
Reviews of AC DELCO parts For Business
USA
I have ACDelcos in my 2010.
I've changed them twice over the 120k or so that I've had the car and I didn't pay attention to what was in it when I bought it, but the person who owned the car before me had a receipt from Advance.
Denso, Bosch, and ACDelco are all OE parts suppliers for various car manufacturers and remans can be found for under $200 online even including the core charge which you'll get back when you send the old starter in.
New Denso wires (these were the OEMs, cheaper to not pay ac delco mark up) and AC-Delco 41-962 plugs.
AC Delco/NGK.
IMHO, this is one of the times where the OEM stuff might be the best way to go, especially if your engine is otherwise stock. It's really common to see these trucks get well over 150,000 out of the original plugs and wires. They're kind of expensive but they just last so long it's worth it.
Been recently thinking that 100 packs of ACDelco for AA and AAA are the best value per watt usage
I put ac delco gold pads and rotors on my 13 and am very pleased with them, good quality.
On rock auto I see new alternators from ac delco. Not sure about any of those brands.
My 6.0 never ran right unless I used AC Delco. And specifically whatever the current equivalent part number is to what the manual says.
For oil filters I feel like the ACDelco filters are pretty low quality and there are many better options. Mobil and K&N oil filters are available at Walmart for $10-15, made in USA, and seem to be much better quality.
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