Sierra 3500 2WD V8-6.0L VIN U (2004)
Engine Oil: Fluid Type Specifications
Engine Oil
API Classification ......................................................................................................................................................................... Look for Starburst Symbol
Above -18° C (0° F) ................................................................................................................................................................... 10W-30, 5W-30 (preferred)
Below -29° C (-20° F) ................................................................................................................................................. 5W-30 synthetic (preferred) , 0W-30