To find the correct oil type, you should:
* Check your owner's manual: This is the most reliable source. It will specify the recommended oil viscosity (like 5W-30 or 10W-30) and type (conventional, synthetic blend, or full synthetic).
* Look for an oil fill cap: Sometimes the recommended oil type is printed on the oil fill cap.
* Use a reliable online resource: Websites like the official Chevrolet website, or trusted automotive parts websites (like AutoZone or Advance Auto Parts) allow you to enter your Avalanche's year, make, and model to find the recommended oil.
Do not rely on generic advice – using the wrong oil can damage your engine. Always consult your owner's manual or a reliable source for the correct information for your specific vehicle.