Remote start problem

[Ground hawg]

hope some one can help. I have a habbit of when ever possible to use the remote statr on my vehicle when ever possible. List week the remote I use died. replaced the batteries, tried again still nothing. grabed the spair, workes no problem. yesterday use the remote, no flashing light in the hummer but she starts right up. side and marker lights dont come on. when I put key in ignition and turn on the lights they work fine.
So, is it a resync that I need to do our have i just worn the system out and need to replace it????

Thanks guys. Ground hwg