Will this fit a 2023 Trailblazer?
Yes, it can fit a 2023 Trailblazer.
How can I get a replacement mounting bracket? The bracket I have needs to be replaced.
From your order page "Order"-"Get help" or "Get product support". We will offer solutions in 24 hours.
Is 220lbs the dynamic weight limit or the static weight limit?
Its the static weight limit. When referring to load capacity on roof rack cross bars, the "max load" can be considered the "static load", because the dynamic load will always be less than the static load.