Click on go advanced post option. Click on manage attachments (way down below submit button). Click browse, if camera vs photos option appears, pick photos. Select your picture and then click upload. Close out that window. You will need to type some text in the text box. Ie here are my pics from xyz. Then click submit. It should work for you.
2014 Crew Cab Chevy Silverado 3500 4wd Duramax/Allison
2014 Sabre 34REQS-6