Fluid · Power SteeringPower Steeringfor 2021 GMC Sierra 3500HD 6.6L V8 Duramax Diesel · 4WDFluid TypeElectric Power Steering (No Fluid)NotesElectric power steering - no fluid requiredOther fluid systems on this vehicleBrake FluidCoolant18 qtEngine Oil13 qtFront Differential1.5 qtRear Differential2 qtTransfer Case2.5 qtAutomatic Transmission13.5 qtWasher Fluid3.5 qt📝 Suggest a correction to this fluid spec