I just bought a used 2001 Blazer and the grate over the defrost vent was missing. While doing some repairs a set of keys slid into the defrost vent and out of sight. How do I get into the vent? I'm not dense but if someone can give step by step instructions, I'd appreciate it.

 

I would recommend attempting to retrieve the keys using a mechanics magnet rather than pulling the dash to get at the defrost duct. Pulling the dash isn't really complex, but it is VERY time consuming.

 

If you could see the keys from outside the vehicle you may be able to use something like this while someone inside tries to grab it.

 

Can you see it with a small mechanics mirror?If so, try and use a (small clawed) magnetic retriever.