Fluid · Front Differential
Front Differential
for 2020 GMC Sierra 3500HD 6.6L V8 Duramax Diesel · 4WD
Fluid Type
75W-90 synthetic gear oil
Spec: API GL-5
Capacity
3.7qt
3.5 L
Drain & Refill
3.7 qt
3.5 L
Change Interval
50,000 mi
80,450 km
Notes
9.76-inch front axle (RPO GT4). Use GM P/N 19329470 or equivalent.
As an Amazon Associate, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.