Approximate Fluid Capacities

The following approximate capacities are given in US English and metric conversions. See Fluid and Lubricant Recommendations for more information. All capacities are approximate. When adding, be sure to fill to the approximate level, as recommended in this manual. Recheck fluid level after filling.

Application	Capacities
Application	Metric	US English
Cooling System without Rear Heat
4.3L	9.5 liters	10.0 quarts
4.8L, 5.3L	11.8 liters	12.4 quarts
6.0L	13.1 liters	13.8 quarts
Cooling System with Rear Heat
4.3L	12.3 liters	13.0 quarts
4.8L, 5.3L	14.6 liters	15.4 quarts
6.0L	16.1 liters	17.0 quarts
Cooling System - Diesel (Pickup Models)	27.0 liters	28.5 quarts
Cooling System - Diesel (Van Models)
Front Heat or A/C Only	20.0 liters	21.1 quarts
Front Heat or A/C Plus Fuel Operated Heater (FOH)	20.9 liters	22.1 quarts
Front and Rear Heat or A/C Only	21.5 liters	22.7 quarts
Front and Rear Heat or A/C Plus Fuel Operated Heater (FOH)	22.4 liters	23.7 quarts
Engine Oil with Filter
4.3L	4.3 liters	4.5 quarts
4.8L/5.3L/6.0L	5.7 liters	6.0 quarts
6.6L	9.5 liters	10.0 quarts
Rear Drive Axle
8.6 inch Rear Axle	2.03 liters	2.15 quarts
9.5 inch Rear Axle	2.60 liters	2.75 quarts
9.75 inch Rear Axle	2.96 liters	3.13 quarts
10.5 inch Rear Axle	2.6 liters	2.75 quarts
Front Drive Axle 7.25	1.20 liters	1.27 quarts
Fuel Tank
Standard Tank - Passenger/Cargo	117.3 liters	31.0 gallons
Standard Tank - Cab/Chassis	124.9 liters	33.0 gallons
Optional Tank - 159 inch (4039 mm) or 177 inch (4496 mm)	215.7 liters	57.0 gallons
Transmission Fluid (Pan Removal and Filter Replacement)
4-SPD 4L60-E	4.7 liters	5.0 quarts
6-SPD 6L90	6.0 liters	6.3 quarts
Auto 6-Speed Transmission Allison	7.0 liters	7.4 quarts
Transfer Case	1.4 liters	1.5 quarts
Diesel Exhaust Fluid (DEF) Tank
Pickup Models	20.1 liters	5.3 gallons
Van Models	20.1 liters	5.3 gallons
CNG Fuel Tank Capacity ¹²	87.4 liters	23.1 gallons
¹ At 24.8 MPa (3, 600 psi) and 21°C (70°F) ² GGE (Gasoline Gallon Equivalent)