Fluid · Rear Differential
Rear Differential
for 2022 Chevrolet Express 6.6L V8 Duramax Diesel · RWD
Fluid Type
75W-90 synthetic gear oil
Spec: GM Part No. 12378261
Capacity
3.4qt
3.22 L
Drain & Refill
3.4 qt
3.22 L
Change Interval
50,000 mi
80,450 km
Notes
AAM 9.5" or 10.5" rear axle depending on GVW rating. May require limited-slip additive if equipped.
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