I have a 2004 Chevy Blazer that I believe had the same issue as you. The wiper arm has a plastic covering over it. You will need to remove it. I using a a Flat head screw driver pry it off where the wiper arm bends. This will allow the base of the plastic piece to pop off the rear of the wiper arm. You can now take a 1/2" socket and tighten up the nut that is under that plastic covering. That was the solution for me anyhow. My driver side wiper arm wasn't moving at all, but the passenger side was. Hopefully that works for you.
Windshield
It is attached to the bottom of the reservoir.
Personally I don't know how to replace a Chevy Blazer windshield, but attached is an article from wikihow that could help you out. If that looks complicated or you can't find the windshield glass check out your local glass shops or websites.
If a windshield wipe arm is loose on a 2002 Chevrolet Blazer, it likely needs to be replaced. It probably has a broken connection.
Have you checked the fuses for the wipers? It may be that simple.
Lower left corner of the windshield, viewed from outside.
yes it does it has one on the top and one the bottom
Check your owners manual, it will tell you in that.
NO, IF YOUR CAR STARTS, IT'S NOT THE MOTOR. MAYBE TRY THE FUSE.
If the windshield wipers won't turn off on a 2000 Chevy Blazer, check the wiper relay switch. This is usually located in the engine compartment fuse box on top of the battery.
The vin can be seen from outside the vehicle by looking though the drivers side lower corner of the windshield.
Yes, the doors from a 98 Chevy Blazer will fit a 2001 Chevy Blazer with a little moderation.