New Gauge installation (HELP!!)

Help me. I recently purchased a new instument gauge face. The installation of the face went smoothly enough, but now all my gauges are reading incorrectly. How do I calibrate these things? Has anyone else done one of these? Oh Yeah-2001 Chevy Silverado 1500

same exact thing here...

You might try disconnecting the negative ground wire to the battery for a minute or so........ then reconnecting. This might allow the computer to reset........ maybe everything will return to normal. Worth a try.