Can you tell me what these codes are or where I can go online to find them, Thanks!
P1442, P1406 and P1441

 

P1406 - egr https://blazerforum.com/m_65358/tm.htm this thread tells how to remove and clean it (dont forget to put in a screened gasket instead of the stock type)
the other 2 are EVAP system errors as far as I can tell, clean the egr and disconnect the battery to clear the codes and see if any of come back (least that's what I would do to start with)

for future reference http://www.obdii.com/codes.asp is nice for looking up the codes.