I Have A Dakota Which Is The Same Interior. You Need To Pop Off The Black Bezel Around Your Gauge Cluster First. After That You'll See Some Screws That Are Revealed Around The Cluster Again, Unscrew These And Unscrew The Ones Down By Your Windshield After You Take Out All Those Screws It Should Pull Off. Pull Slow And Check For Any Connections.
rtillaree's suggestion is a good one but if you don't need all the maintenance/engine/etc info for your vehicle you can buy the MasterSheets for it from Crutchfield for like $6 and it should give you all the info you need regarding aftermarket audio installation //content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gif