Can I add key pad to my 03 f150 extended cab for the keyless entry?

 

There is one that is a stick on option that is programed like a regular key fob. They are like $70.

edit:
Not sure if it will unlock the truck when the truck is running though. If you currently can unlock the truck when running with you keyfob, then this should do the same.

 

I Seen those but don't Know if they light up.

 

I put one on my 2002 F150.......... works great, has a small internal battery and suppose to last 10 years. AS long as your truck has key FOBS then you have an electronic receiver installed and the stickon pad without wires will work.