Hi, Carl! There is a little more information we need to see if we have the AlloyCover for your specific configuration of the 2020 GMC Sierra. If you can answer those questions here you will be able to see if the product is in fact available for your setup: https://www.weathertech.com/gmc/2020/sierra-1500/alloycover/#
Sorry, I have a Nissan SV
Sorry no, I have a Ford
Thanks! Your answer is awaiting moderation.