Width

Buy a tape measure and go to a Chevy dealer.

Snappy answers but you could just admit you don't know. I have a tight garage door opening and have to enter it at an angle. Tricky if the width including mirrors is too wide. All measurements I find don't include the mirrors.

Right, so that information is not readily available. Only a person who owns one could answer your question. This is public forum, so the odds of finding an owner to show up here and answer it is slim to none. So we have to get creative.

I would try posting this on a Blazer forum, that way someone else who owns one can measure this for you.

So much angst when there is a simple solution..........................

The 2021 Blazer width mirror tip to mirror tip is 85.5 inches.