DIC on my van

The DIC on my car is acting eratic the temp is not correct and the direction is off, can this be replaced and is it something I can do myself? Cost?

Check on eBay Motors to see if any are available. Here’s one to consider:

http://cgi.ebay.com/ebaymotors/2002-Oldsmobile-Silhouette-Upper-Center-Console-Onstar-/310176543744?cmd=ViewItem&pt=Motors_Car_Truck_Parts_Accessories&hash=item4837f67400#ht_3867wt_939

First post disappeared, check that magnetic zone is correctly set, replace ambient temp sensor, not very expensive.