I ordered the refreshed LT Trail Boss. Adding the PQB Safety Package deletes the DPO Trailering mirrors on LT and RST trims. I don't think the ZR2, LTZ or High Country are affected since they have different trailering mirrors.
Looks like it is fairly easy to install the auto dimming rearview, so I'll just do that after I take delivery. I may add Boost trailer mirrors when they become available, we'll see.