What type of oil 1997 Tahoe 350?

A 1997 Chevrolet Tahoe with a 350 engine (5.7L V8) should use SAE 5W-30 motor oil. However, always check your owner's manual for the manufacturer's specific recommendation, as this can vary slightly depending on climate and driving conditions. The manual will also specify the oil type (conventional, synthetic blend, or full synthetic).