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GMC Sierra/Sierra Denali 2500 HD/3500 HD Owner Manual (GMNA-
Localizing-U.S./Canada/Mexico-14632286) - 2021 - CRC - 11/19/20
Technical Data
405
Application
Capacities
Metric
English
I
3500 Series Chassis Cab
–
Front Tank
89.0 L
23.5 gal
I
3500 Series Chassis Cab
–
Rear Tank
151.4 L
40.0 gal
Transfer Case Fluid
2.3 L
2.4 qt
Hydraulic Power Steering Fluid
2.0 L
2.1 qt
Wheel Nut Torque
190
Y
140 lb ft
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.
Engine Specifications
Engine
VIN Code
Spark Plug Gap
6.6L V8 (L8T)
7
0.95
–
1.10 mm (0.037
–
0.043 in)
Spark plug gaps are preset by the manufacturer. Re-gapping the spark plug is not recommended and can damage the spark plug.