I got my 2020 oil cooler and coolant adapter elbow this afternoon. I found out they use a different oil filter than the standard filter they have used since 2001. It appears to take the same filter the Silverado has used since around 2016 according to the application data on Wix’s website. I am just guessing at the filter based on dimension I can measure on the housing. Anyway, here is a picture of the new L5P cooler next to the old L5P cooler which as you can see in previously posted pictures is larger than the LML and earlier coolers.
Also, if you do order the new stuff, you will need the gasket that goes between the elbow and the cooler. The part number for that is 12676826.