The recommended oil weight for your 2000 Chevy Suburban depends on the engine it has and the climate you live in. The owner's manual is the definitive source for this information. It will specify the recommended oil viscosity (weight) – usually something like 5W-30, 10W-30, or another similar designation.
Without knowing your engine size (e.g., 4.8L, 5.3L, 5.7L, 6.5L diesel), I cannot give you a precise answer.
However, 5W-30 is a common and often recommended weight for many 2000 Chevy Suburban engines. But again, check your owner's manual. Using the wrong weight oil can damage your engine.
