GMC CHEVROLET Silverado 1500 2021 Owner's Manual page 426

All capacities are approximate. When adding, be sure to fill to the approximate level, as recommended in this manual. Recheck fluid level
after filling.
*Engine cooling system capacity values are based on the entire cooling system and its components.
2.7L L4 (L3B)
4.3L V6 (LV3)
5.3L V8 (L82)
5.3L V8 (L84)
6.2L V8 (L87)
Spark plug gaps are preset by the manufacturer. Re-gapping the spark plug is not recommended and can damage the spark plug.
Application
Engine Specifications
Engine
Capacities
Metric
VIN Code
K 0.65 0.75 mm (0.026 0.030 in)
H 0.95 1.10 mm (0.037 0.043 in)
F 0.95 1.10 mm (0.037 0.043 in)
D 0.95 1.10 mm (0.037 0.043 in)
L 0.95 1.10 mm (0.037 0.043 in)
Technical Data 425
English
Spark Plug Gap