Most auto paint and body supply stores that have been in business for a while will have older paint books to look thru. Just need to get out there and look at the samples in person.
Nice truck.
Welcome from KC.
Not trying to stir up s_ _t but if computer chips are the scourge of our lives why does everyone on this forum Cary around a chip filled cell phone?? Don't forget about your big screen TV. Not to mention medical devices that have improved our lives. In fast 99 defense nuclear bombs have chips...
I would try replacing the cap. You will have to find a local electrical supply the sales to the public. Take it with you and they can help identify it. They are not that expensive. Take picks of the wires before you take it apart.
Try silicone spray first. Helped a lot on mine. Just spray the channels with the window down. If the door panel is off you can also spray the bottom of the channel.