I recently purchased a 2009 Silverado and it is missing a center cap the dealership orderd me one but it was the wrong one I was wondering if anyone knew a part number or knew what kind it is the rim is 20"

 

These look like what you are looking for. Check out Ebay and Amazon, they have many to choose from.

https://www.ebay.com/itm/2-Center-Hub-Caps-Silver-Black-Center-for-18-20-Inch-Chevy-5-spoke-wheel-9597991/202193724824?fits=Year%3A2009%7CModel%3ASilverado+ 1500&_trkparms=ispr%3D1&hash=item2f13af6598:g:-J8AAOSw8i9aYQrQ&enc=AQAEAAACYBPxNw%2BVj6nta7CKEs3N 0qWlHckXM71J9MzVuKC6QuKYd59%2BjZ1KugesRkn3DmD%2FsE MrknKvrdWSrEKiNg9g7A%2BueONgQSkS6a3J2%2BBFhaaihbG2 W6XNov3LeiI0nkt2sAx4%2FDKRe6nXuYUFqDriciCGShe46%2F M1m%2F7qfZvoAf14tDKO%2FfHe%2Bed1oHJ8vURZVQG3Murp0D HrK2R0pAtQSfdsZDh%2BbV8p8Xo4BcrsGcT0TeeJSAFXjQj96F t8kehex8W6CAHmiryUVm849ngR0LQbOzK01EacqXZYRfgqoWl4 kkQdvhaH8rrmVKwSKXN87Mx30AbRVYMDJdwxqTqDDzGq5RN4rL 5g6IfaoNGJxeP0SFusN
Kxg%2Fu33zpiBJRs0t56em2wnw%2BfVP7TxuZRoExz%2BENheX WKJ1lfIuxMOn9oTJ0j4bHWB0%2B%2Ba0ZsXFg6YAyKGhIpfmOn zkAfexEDR1cGq41SWzraPC9qAxHMKakla%2FUvkgbdNjVHlpk7 u2n8lX4m1w388PZyOKH6vxS0OYW1puY4%2FwSTDK9y3aHGoMMZ ULpzEs%2BufS2MusNYVofE1rk7c7MmtO6nA0XY7KxkrKhYGJZA AJJ%2BOzV8Pc7UgR9HFCdftfJuzlig7J17BZeOLzzlYqpiKKLX XYliT1IoV1VVd7H6TRvV%2FH1TWo%2FHwuJfPwFu8gCU1Tkb5I WMQLLd3C%2FftKjUgZFQP8DgbMA4qr4hdURBopbrJ1HIMWvkTh Wsej%2BViW45ic2en%2FrWe0u%2F5xc4SDEHkIj1OUpSYKjSdF LUqkD9hTqll%2Bz2DcPqFYOfn&checksum=202193724824984 0913879f04eaaa015c55594336d51

https://www.ebay.com/itm/2-Center-Hub-Caps-Silver-Black-Center-for-18-20-Inch-Chevy-5-spoke-wheel-9597991/202193724824?fits=Year%3A2009%7CModel%3ASilverado+ 1500&_trkparms=ispr%3D1&hash=item2f13af6598:g:-J8AAOSw8i9aYQrQ&enc=AQAEAAACYBPxNw%2BVj6nta7CKEs3N 0qWlHckXM71J9MzVuKC6QuKYd59%2BjZ1KugesRkn3DmD%2FsE MrknKvrdWSrEKiNg9g7A%2BueONgQSkS6a3J2%2BBFhaaihbG2 W6XNov3LeiI0nkt2sAx4%2FDKRe6nXuYUFqDriciCGShe46%2F M1m%2F7qfZvoAf14tDKO%2FfHe%2Bed1oHJ8vURZVQG3Murp0D HrK2R0pAtQSfdsZDh%2BbV8p8Xo4BcrsGcT0TeeJSAFXjQj96F t8kehex8W6CAHmiryUVm849ngR0LQbOzK01EacqXZYRfgqoWl4 kkQdvhaH8rrmVKwSKXN87Mx30AbRVYMDJdwxqTqDDzGq5RN4rL 5g6IfaoNGJxeP0SFusNKxg%2Fu33zpiBJRs0t56em2wnw%2BfV P7TxuZRoExz%2BENheXWKJ1lfIuxMOn9oTJ0j4bHWB0%2B%2Ba 0ZsXFg6YAyKGhIpfmOnzkAfexEDR1cGq41SWzraPC9qAxHMKak la%2FUvkgbdNjVHlpk7u2n8lX4m1w388PZyOKH6vxS0OYW1puY 4%2FwSTDK9y3aHGoMMZULpzEs%2BufS2MusNYVofE1rk7c7Mmt O6nA0XY7KxkrKhYGJZAAJJ%2BOzV8Pc7UgR9HFCdftfJuzlig7 J17BZeOLzzlYqpiKKLXXYliT1IoV1VVd7H6TRvV%2FH1TWo%2F HwuJfPwFu8gCU1Tkb5IWMQLLd3C%2FftKjUgZFQP8DgbMA4qr4 hdURBopbrJ1HIMWvkThWsej%2BViW45ic2en%2FrWe0u%2F5xc 4SDEHkIj1OUpSYKjSdFLUqkD9hTqll%2Bz2DcPqFYOfn&check sum=2021937248249840913879f04eaaa015c55594336d51

 

I don't think they are the rims are chrome..and the center caps in your thread look to be different..I've seen those before...I dont know why it is so hard to match up ....frustrating...