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Home >> GMC >> 2021 >> Sierra 2500 HD Denali, 6.6L Eng VIN Y >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 6.6L (L5P) Diesel - Specifications >> Specifications >> Approximate Fluid Capacities

Approximate Fluid Capacities

Application Specification
Metric English
Fuel Tank Capacity - 2500 Series and 3500 Series Standard Box (Except Double Cab Diesel) 136.3 liters 36.0 gallons
Fuel Tank Capacity - 2500 Series and 3500 Series Standard Box (Double Cab Diesel) 111.3 liters 29.4 gallons
Fuel Tank Capacity - 2500 Series and 3500 Series Long Box (Except Regular Cab Diesel) 136.3 liters 36.0 gallons
Fuel Tank Capacity - 2500 Series and 3500 Series Long Box (Regular Cab Diesel) 106.0 liters 28.0 gallons
Fuel Tank Capacity - 3500 Series Chassis Cab - Front Tank 89.0 liters 23.5 gallons
Fuel Tank Capacity - 3500 Series Chassis Cab - Rear Tank 151.4 liters 40.0 gallons