Engine Oil

TYPE SG, SH

CAPACITY, Refill:
6-cyl. 4.3L 3.8 Liters* 4.0 Quarts*
8-cyl. 5.7L 1992-94 4.7 Liters 5.0 Quarts
Others 3.8 Liters 4.0 Quarts
8-cyl. 7.4L: 1988-90 4.8 Liters 5.0 Quarts
1991-94 6.6 Liters* 7.0 Quarts*
Others 5.7 Liters 6.0 Quarts

Capacity shown is without filter. When replacing filter, additional oil may be added.
*1992-93 C3500 models add an additional one (1) quart (0.95L)
Above 40°F (4°C) 30‡
Above 0°F (-18°C) 10W-30**
Below 60°F (16°C) 5W-30
**Preferred
‡May be used when other recommended viscosities are unavailable