I am need to find engine trouble code (check engine light) where can get them ty on 2002 GMC Sonoma

I am need to find engine trouble code (check engine light) where can get them ty

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2 answers 1 comment
For code descriptions http://www.obd-codes.com/
For instructions for repairs and tests, There is a company that independent auto repair shops get their information from, this same information is available inexpensively for people that work on their own cars.. The information is year make and model specific, covering repair procedures, torque specifications, fluid capacities and specifications, service bulletins, component locations, wiring diagrams ect.... Alldata is very easy to navigate http://bit.ly/AllData_Repair_Manuals_Online
you can use a scan tool to check it out, this us703 support your car.
http://chinasinoy.com/wholesale/maxiscan-us703-code-scanner-reader-free-shipping.html
ty for your help