Hi, first time using this forum.
I have a 1999 Chevy Blazer Trailblazer with 93,000 miles.
Just an hour ago I replaced my radiator as the last one had a huge hole in it. I put the battery back in once the new radiator was installed and started up the Blazer. My Fuel gauge, temp gauge, and speedometer were pegged all the way past full. Does anybody know if I blew a fuse or unplugged something by accident that would cause that?

 

Forgot to reattach a ground or a ground wire broken? I think there is one in the vicinity of the area where the battery is near the radiator.