How do you program a keyless remote for a 2003 Chevrolet Blazer?
A dealership has to do it for you if it is the original from the
dealer. If it is aftermarket, like one from car toys they will have
to do it for you. Only the company that installed it will have the
codes to program it. I have a 2003 xtreme myself, and i have a
dealer keyless entry, but I had car toy's install an alarm with
other remote functions, only they can program the newer one.