Fluid · CoolantCoolantfor 2021 GMC Sierra 2500HD 6.6L V8 L8T · 4WDFluid TypeACDelco DEX-COOL (Orange)Capacity18qtNotesUse pre-mixed or mix 50/50 with distilled waterOther fluid systems on this vehicleBrake FluidEngine Oil8.5 qtFront Differential1.5 qtPower SteeringRear Differential2 qtTransfer Case2.5 qtAutomatic Transmission13.5 qtWasher Fluid3.5 qt📝 Suggest a correction to this fluid spec