I bought this one on amazon it works and looks good

ONE250 Bullet Style Antenna for Chevy & GMC Trucks All Models - Will fit Any Chevrolet Silverado, Chevrolet Colorado, GMC Sierra or Denali (Blue) https://www.amazon.com/dp/B07XMD5K9H/ref=cm_sw_r_cp_api_glt_fabc_63VBA2DW8BCF2D59G791?_encoding=UTF8&psc=1