Truck Repair: engine trouble codes, 2006 chevy silverado, chevy silverado

Question
engine light has been on for two weeks.2006 chevy silverado. had it diagnosed.with trouble codes P-0449 and P-0455....can not find the answers on line!!! they say it has something to do with emmisions....could you help??

Answer
i don't know anything about pickups but i did a search for you and here is what i found.
for p-0449 code check this link http://www.ls2.com/boggs/dtcs/DTC%20P0449.htm
and for p-o455 check this link http://www.obd-codes.com/p0455

perhaps those links can help you out. sorry couldn't help i work on semi trucks.