90 shadow won't shut off

I bought a 2001 Firebird and declined the Key Remote. Dealer said no problem. When you want it, to bring it back in and they can do it for around $100. ( That was in 2001 )... I have found a few sites that sell the Keyless Remote for around $35. The one thing I need to know is, how to I check the car to seen if the Keyless Entry System has been Factory System Installed on the car? Thanks for the help in advance! Ron

Good day all, I have a 1990 Dodge Ram 50 comapct truck (Canadian model). the issue I'm having, which has been the same with the previous owner, is that the radio works only when the marker lights are off. i've putzed around with it today trying to find out why the radio wasn't working and determined that when the key is in accossory postion, the lights work. in accessory postion and radio working, turned the headlight switch on, the radio quits. turn light switch off, radio comes back on. when the key is turned further to the "on" position and the daytime running lights and marker lights come on, the radio quits. i pulled the fuse for the marker lights, and the radio stayed on (but then no marker lights). could there be a faulty relay or something causing this, or could it be more complicated like a crossed wire somewhere? thanks for looking at this, and i hope someone can respond.