cant pass smog??/?????

[buickv6turbo]

hey guys well i cant seem to pass my smog check i did a tune up replaced the o2 sensor replaced the egr valve and the egr solenoid still didnt pass what else could be wrong ??????????

 

[vkasm1]

You should of posted this in the smog tech section.
Also post your gas results so we can try help

vic