2024 Duramax Oil Capacity 4wd. Acdelco oil filter is suggested but other aftermarket options are available as well. Oil pressure is between 19 and 21 psi once in a while it will jump to 37 but drop right back down to 19 regardless of engine temp.

Comprehensive service schedule and maintenance parts list. The 6.6 liter duramax oil capacity is 10 quarts — a massive amount of oil.