GMC SIERRA 2020 Owner's Manual page 460

4.3L V6 Engine 1500 Series
5.3L V8 Engine 1500 Series (L84)
6.2L V8 Engine 1500 Series
6.6L V8 Gas Engine
Fuel Tank
1500 Series Standard and Short Box (4WD Gas and
Diesel)
1500 Series Standard and Short Box (2WD Diesel)
1500 Series Long Box
2500 Series and 3500 Series Standard Box (Except
Double Cab Diesel)
2500 Series and 3500 Series Standard Box (Double Cab
Diesel)
2500 Series and 3500 Series Long Box (Except Regular
Cab Diesel)
2500 Series and 3500 Series Long Box (Regular Cab
Diesel)
3500 Series Chassis Cab
Application
2500 Series and 3500 Series
Front Tank
Technical Data
Capacities
Metric
5.7 L
7.6 L
7.6 L
7.6 L
90.8 L
83.3 L
106.0 L
136.3 L
111.3 L
136.3 L
106.0 L
89.0 L
459
English
6.0 qt
8.0 qt
8.0 qt
8.0 qt
24.0 gal
22.0 gal
28.0 gal
36.0 gal
29.4 gal
28.0 gal
28.0 gal
23.5 gal