5w30
PF46 if 5.3.
Use SAE 5w-30 weight oil.
10w30 unless it is burning oil, in that case use 10w40.
5W30 weight.
I don't think they ever came with diesels, so any 5w30 will do well. If it does have a diesel then 15w40.
5w30 only.
SAE 10w30.
Factory says to use 5W30 weight oil.
what weight of oil do i use in my 1994 Chevy astro all wheel drive differential and transfer case
87 octane
YES, it is safe to use that weight of oil in the WARM months, But nothing heaver.
90 W Gear oil