Parts will be a mishmash between the dealer, aftermarket and junk yards...nothing wrong, nor tough about that...just time it takes to get the parts...
Here is my story on a very similar situation
After decades using the family station wagon as the very small mom n pop specialty grocery/butcher shop...he decided to purchase a pickup after uncle Bill and I said the wagon wasn’t rebuildable
He only wanted a half ton for ride quality...uncle Bill advised me to order the HD half ton n dad wouldn’t know cuz he only looks at the badging...
Ordered a Chevy “Big Ten”, the Heavy Duty half ton of 1980.Everyone beat up hauling canned good to beef quarters...down to the bump stops...
Dad gave it to me around 1999 with about 300,000 miles on it.
It was both my girls first ‘car’ and was known as “The Truck”...
My philosophy on automotive...is that it is the worst necessary investment...so keep mine forever until either can’t fix it anymore or don’t want to any more
Well...it failed this years SMOG test and going to need a carb rebuild..
The body has dents on each panel (daughters), that years smog stuff is horrible, bench seat covers need replacement, needs repaint (rust on each panel)....but the KYB’s and 33/12.5R15LT’s has it corner like on rails...the 1 ton helper coils on the rear axle helps
Just bought a 2007 Nissan Frontier, crew cab, long wheel base 6.5 ft bed. SE...base model with AC, power door lock n windows
The Silverado will be donated
But, if I owned your pickup...I’d keep it, but that is just me...