2000 m/c ss ignition control module problems

I am wondering what are the syptoms of having a bad ignition control module in a 2000 monte carlo 3.8L ss? Was told this was the problem, but wanted to make sure before I spend the money to buy this part. Is it hard to replace (DIY)??

some quick active forums :)

http://www.montecarloforum.com/forum/

http://www.montecarloclub.com/discuss/viewforum.php?f=2&sid=b448755cd314bcf6c4b86fd164579515