Intermittant Rear Passenger Door Open Warning
 

I have a 2003 Chevy 2500HD Crew Cab and have been getting an intermittant door open warning for the rear passenger side door. I have replaced the $90 switch in the door and it made no difference. I don't mind the door open warning being on when I am driving, but it sets off the alarm at times when the truck is parked and then leaves the dome lights on until the battery runs low. Anyone out there have any information on possible cause. I don't mind taking it to the dealer if I have to but I hate getting the run around with intermittent problems. Thanks. Jeff