* Conventional oil: This was more common in 2000. The weight (like 5W-30 or 10W-30) will be specified in your owner's manual.
* Synthetic blend oil: This offers a balance of performance and cost. Again, the weight will be in your manual.
* Full synthetic oil: This is the highest performing but most expensive option. The weight will be in your manual.
Crucially, the owner's manual will specify the correct oil weight and API certification (like SJ, SL, SM, etc.). Using the wrong oil can damage your engine. Look for a sticker under the hood or in the glove compartment that might list the recommended oil type as well. If you can't find your owner's manual, you can often download a digital copy from the Chevrolet website by entering your VIN.
Don't rely solely on online advice. Consult your owner's manual for the definitive answer.