Fluid · Front Differential
Front Differential
for 2026 GMC Sierra 3500HD 6.6L V8 Duramax Diesel · 4WD
Fluid Type
75W-90 synthetic
Spec: GM Part 88862624 (75W-90 GL-5)
Capacity
3.6qt
3.41 L
Drain & Refill
3.6 qt
3.41 L
Notes
AAM 9.76 front axle. Limited slip additive may be required if equipped with locking differential
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