2006 Uplander dash and sliding doors

Hey folks, I just purchased a 2006 Uplander extend lt van. I noticed after purchase the odometer shows nothing (is it something simple im missing). the message center seems to work. I was told it had 67000 miles on it and im wondering how they came up with that number? I didnt do my homework and I hope i didnt screw myself by getting this vehicle. It also has the sliding door issue mainly the driver side. When both sliding doors are closed and in park the buzzer stays on. when the passenger door is run through, the buzzer goes off. Once the van is put in drive the buzzer comes an again. Has anyone had any luck dealing with this issue or the odometer issue?. Any help would be appreciated , thanks

Are you working with a GM dealer regarding your concerns? I can also look into this for you with your VIN. Please feel free to contact me via private message. Thank you in advance.

Tricia, GM Customer Service.