2014 Sierra Denali Door Ajar Switch Not Working

[sambone95]

I changed my driver door lock actuator motor today due to intermittent functionality issues . After reassembly, the driver door is not being recognized as open. The vehicle thinks the driver door is in a perpetually closed state. Everything else works. The door lock actuator issue is resolved. The driver door opens and closes perfectly. All power window switches, power door locks, child door and window locks and power mirror functions on the driver switch pack work as they should. The memory switches on the driver's door work. All other door ajar switches work.

 

I have pulled the door back apart, checked all of the pins and connections to the driver door switch pack. Checked all the connections at both ends of the driver door wire harness. Checked the connection at the actuator. Checked all wires passing between the door to the body. Everything appears normal. 

 

Back in the day, door ajar switches were pretty simple pressure switches on the door frame. I don't know what mechanism is used on today's truck to trigger an open/closed door. 

 

It's probably worth mentioning, I changed the motor inside the door actuator not the entire actuator assembly. Also, against my better judgement, I did not disconnect the battery during installation so I could test the windows and door locks  as I reassembled. The truck is a 2014 Denali with about 67,000 miles. 

 

Any thoughts or insights would be appreciated.