stereo problems after new one

Hello, 

             I had a Pioneer am fm cd bluetooth radio installed by guys that I assumed knew how to do it, Into my 2000 chevy Silverado truck.. Now I am having these problems ever since.. 1 My RPM/Speedometr gauges are jumping when you click the ignition on, but go to normal after a few seconds. 2.  My stereo wont keep memory of clock setting, station settings, etc   This is a Pioneer radio taking the place of a factory Delco cd am/fm. Also I am worried that its not wired correctly becasue they had a hard time color coding what wires went from harness to new radio.. Im also worried that it is wired wrong and It will run my battery down after it sits.. Please help me with this.I thank you so much!