2021 Chevrolet Silverado 2500HD/3500HD specs
Maintenance specs from the 2021 Chevrolet Silverado 2500HD/3500HD owner's manual. Open a spec for every version and the page it's printed on.
Engines covered: 6.6L V8 (L8T)
Engine & fluids
Tires & wheels
Capacities & towing
Coolant
| Applies to | Value | Manual says | Page |
|---|---|---|---|
| All versions | 15.4 qtcapacity | “Engine Cooling System* 14.6 L 15.4” | PDF page 399 ↗ |
Lug nut torque
| Applies to | Value | Manual says | Page |
|---|---|---|---|
| All versions | 140 lb ft | “Wheel Nut Torque 190 Y 140” | PDF page 400 ↗ |
Spark plugs
| Applies to | Value | Manual says | Page |
|---|---|---|---|
| 6.6L V8 (L8T) | 0.95–1.10 mmgap | “0.95–1.10 mm (0.037–0.043 in)” | PDF page 400 ↗ |
Confirm with your own manual, dipstick or door-jamb label.
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