Bought 2013 Vibe last October, 2017 from dealer and checks were done prior to delivery by them. After setting up and using 3 weekends decided to empty tanks. Poured some water into toilet and went outside. Pulls weren't labeled so I pulled them both and nothing came out. Repeatedly pushed and pulled both handles and still nothing. Black was full after I put water in it and grey was used as we did dishes etc. Anything I am not doing correctly in pulling handles? Something special I should be doing. Please help as just purchased trailer smells worse than a porta jon.
Thanks in advance for any help!