Silverado 1500 2001 Check Engine Light Problems???

[cs2001owner]

Hi I own a Silverado 1500 2001, It's been giving me the check engine light and I don't know what seems to be the problem. I changed he evap canistor, gas cap, engine filter,and fuel pump. Please give me some ideas why it could be still happen and what else should I try to resolve this problem. Thanks in advance for any suggestions.

 

[zora]

have you gone to autozone or somewhere else and can post what the codes are?