Ive got a 2000 Chev 1 ton with a 454 I use for a service /tool truck.
It usually goes and runs OK everyday but lately its giving me some issues.
I leave it out west at a job site.
Every morning when we start it up it gets hot, guage goes right over.
Shut it off and leave it for 10 minutes and its Ok.
Its like something is freezing (its been -10 and colder) and after it gets hot it thaws out.
Its good all the rest of the day but will get hot again tomorrow morning.
Its got lots of antifreeze , a 6 month old rad and a waterpump in the last year.