Up for sale is a Stant Fuel Tank Cap, model 10609, suitable for a 1981 GMC Astro. This item is brand new and has never been used. It is designed specifically for diesel engines and is a reliable and durable option for your vehicle's fuel system. The cap fits securely and prevents any leaks or spills, ensuring the safe and efficient operation of your vehicle. Additionally, please be aware that this product contains chemicals known to the State of California to cause cancer and reproductive harm.