I have a new 1500 with only 1800 miles and just today my Emergency Brake and ABS light came on. Also the Idle has dropped to 500 rpms. Has anyone heard of this and if so what should I do about it?

 

In my experineces with what you are describing if your speedo has not worked under 25 miles per hour then i believe your rear wheel speed sensor is out. I had the same problem on my dak and i know a lot of others have had it too.
If your truck is still under warrenty then get it replaced if not do it your self. Its only hand tools and about 45 min of your time. The dealer should have the part in stock. Mihgt even chaeck the aoutparts stores for it