Yes, And if you need one they are $180.00 at your GM dealer.
Usually no warning
Keyless entry is an option and may have not been installed.
My 1995 Ford Explorer XLT has keyless remote and the numbered " keypad " on the drivers door
It should , my 1995 Explorer XLT has a keyless entry pad on the drivers door and came with 2 remotes
You will not get one remote to work for both of those cars. If you had two cars that use the same style of keyless entry remotes(also called Key FOBs) you could program the two cars to use the same remote.
Yes
The remote keyless entry control box on my '96 is behind the plastic cover underneath the dash just below the steering column.
No you can not.
it could havebeen built with it or with out
It could be the remote has a dead battery. If both remotes don't work, seems like the sensing unit in the car has failed. The remote battery is the easier problem to fix.
i looked forever to find how to do this with my 1995 sivlerado, http://www.programyourremote.com/classified/DisplayAd.asp?id=1460 that is the page with how to program it, also has a lot of makes and models of how to program keyles entry
Not with the keyless entry pad or remotes - unlock your drivers door using your key That's what I had to do on my 1995 Ford Explorer when the battery had a dead cell and there was no power