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5w30 is recommended
According to the manual, the recommended weight is 5w30. I do not know if there is a recommended brand or not.
30 straight weight
5w30 is recommended.
5 W 30
5 quarts
5W30 weight ONLY. Anything heaver will BURN up the valvetrain.
7 quarts is the recommended amount of oil in a 1999 Chevrolet Silverado 3500. You should change your oil every 3 months or every 5,000 miles in this truck.
10w 30
The recommended oil viscosity is 5W-30 or 10W-30. 5W30 weight if it's going to be 0°F (-18°C) or above.
5W30 It is written on the oil filler cap.
what weight oil used for 2004 Chevy silverado the standered is usually 5 w 30