2021 Chevrolet Silverado 2500HD/3500HD Fuel tank size
Depends on your version. Choose yours, or compare them here.
- 2500 Series and 3500 Series Standard Box (Except Double Cab Diesel) 36.0 gal
- 2500 Series and 3500 Series Standard Box (Double Cab Diesel) 29.4 gal
- 2500 Series and 3500 Series Long Box (Except Regular Cab Diesel) 36.0 gal
- 2500 Series and 3500 Series Long Box (Regular Cab Diesel) 28.0 gal
36.0gal
2500 Series and 3500 Series Standard Box (Except Double Cab Diesel)
29.4gal
2500 Series and 3500 Series Standard Box (Double Cab Diesel)
36.0gal
2500 Series and 3500 Series Long Box (Except Regular Cab Diesel)
28.0gal
2500 Series and 3500 Series Long Box (Regular Cab Diesel)
2021 Chevrolet Silverado 2500HD/3500HD Owner's Manual, PDF page 399
I2500 Series and 3500 Series Standard Box (Except Double Cab Diesel) 136.3 L 36.0Open the manual at this page ↗Added Oct 15, 2026
See where it's printed
Fuel tank size · 2500 Series and 3500 Series Standard Box (Except Double Cab Diesel) · PDF page 399
I2500 Series and 3500 Series Standard Box (Except Double Cab Diesel) 136.3 L 36.0
Fuel tank size · 2500 Series and 3500 Series Standard Box (Double Cab Diesel) · PDF page 399
I2500 Series and 3500 Series Standard Box (Double Cab Diesel) 111.3 L 29.4
Fuel tank size · 2500 Series and 3500 Series Long Box (Except Regular Cab Diesel) · PDF page 399
I2500 Series and 3500 Series Long Box (Except Regular Cab Diesel) 136.3 L 36.0
Fuel tank size · 2500 Series and 3500 Series Long Box (Regular Cab Diesel) · PDF page 399
I2500 Series and 3500 Series Long Box (Regular Cab Diesel) 106.0 L 28.0
2021 Chevrolet Silverado 2500HD/3500HD Owner's Manual, PDF page 399
I2500 Series and 3500 Series Standard Box (Except Double Cab Diesel) 136.3 L 36.0Open the manual at this page ↗Added Oct 15, 2026
See where it's printed
Fuel tank size · 2500 Series and 3500 Series Standard Box (Except Double Cab Diesel) · PDF page 399
I2500 Series and 3500 Series Standard Box (Except Double Cab Diesel) 136.3 L 36.0
2021 Chevrolet Silverado 2500HD/3500HD Owner's Manual, PDF page 399
I2500 Series and 3500 Series Standard Box (Double Cab Diesel) 111.3 L 29.4Open the manual at this page ↗Added Oct 15, 2026
See where it's printed
Fuel tank size · 2500 Series and 3500 Series Standard Box (Double Cab Diesel) · PDF page 399
I2500 Series and 3500 Series Standard Box (Double Cab Diesel) 111.3 L 29.4
2021 Chevrolet Silverado 2500HD/3500HD Owner's Manual, PDF page 399
I2500 Series and 3500 Series Long Box (Except Regular Cab Diesel) 136.3 L 36.0Open the manual at this page ↗Added Oct 15, 2026
See where it's printed
Fuel tank size · 2500 Series and 3500 Series Long Box (Except Regular Cab Diesel) · PDF page 399
I2500 Series and 3500 Series Long Box (Except Regular Cab Diesel) 136.3 L 36.0
2021 Chevrolet Silverado 2500HD/3500HD Owner's Manual, PDF page 399
I2500 Series and 3500 Series Long Box (Regular Cab Diesel) 106.0 L 28.0Open the manual at this page ↗Added Oct 15, 2026
See where it's printed
Fuel tank size · 2500 Series and 3500 Series Long Box (Regular Cab Diesel) · PDF page 399
I2500 Series and 3500 Series Long Box (Regular Cab Diesel) 106.0 L 28.0
See every quote (4 values)
All versions
| Applies to | Value | Manual says | Page |
|---|---|---|---|
| 2500 Series and 3500 Series Standard Box (Except Double Cab Diesel) | 36.0 gal | “I2500 Series and 3500 Series Standard Box (Except Double Cab Diesel) 136.3 L 36.0” | PDF page 399 ↗ |
| 2500 Series and 3500 Series Standard Box (Double Cab Diesel) | 29.4 gal | “I2500 Series and 3500 Series Standard Box (Double Cab Diesel) 111.3 L 29.4” | PDF page 399 ↗ |
| 2500 Series and 3500 Series Long Box (Except Regular Cab Diesel) | 36.0 gal | “I2500 Series and 3500 Series Long Box (Except Regular Cab Diesel) 136.3 L 36.0” | PDF page 399 ↗ |
| 2500 Series and 3500 Series Long Box (Regular Cab Diesel) | 28.0 gal | “I2500 Series and 3500 Series Long Box (Regular Cab Diesel) 106.0 L 28.0” | PDF page 399 ↗ |
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