For those wondering or interested in getting leds, I ended up getting these. Wow!! How has everyone not done this! Easy swap. Literally plug and play (if it doesn't come on, flip it. Polarity has to be right. Check before you re-installinto housing). Ordered 2 sets of these. And yes, amazon says they do not fit the 2021 silverado 2500, but they do. Best $66 mod! Ha
https://www.amazon.com/dp/B07NPMV1H5/ref=cm_sw_r_cp_apa_fabc_B6VV7V6EX35AHWZ2SSSV?_encoding=UTF8&psc=1