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Most modern cars have a security code enable for the installed radio/cd players. This is an anti-theft device.
The initial documents given to the owner when the vehicle was purchased lists this code and how to reset it.
If you are second owner/original owner who has lost this information, then, you can approach gmc canyon dealer and they will have this code on their server. Normally a free service (I believe).
The security code is lost from the radio whenever keep alive voltage is removed from the radio. i.e. You disconnected or replace the battery.
IT SOUNDS LIKE U HAVE MORE THAN ONE PROBLEM. THAT CODE IS USUALLY SET WHEN U HAVE A PROBLEM WITH YOUR GAS CAP OR SOMETHING IN THE EVAPORATIVE GAS PRESSURE VAPOR SYSTEM. MOST COMMON THINGS ARE THE GAS CAP IS LOOSE,AFTERMARKET GAS CAP.
You can to the Salvage Yard for a new computer, but your going to have to get it reprogram to your ignition keys, so the Passlock will start the engine. Before you go through all of that. recheck every thing, it could be your crank sensor or your ICM faulty causing your engine to shut down. Keep me posted and let me know what DTC codes you have. Note: a faulty fuel pump or dirty fuel filter will not set a DTC code. You may have a dirty fuel filter or faulty fuel pump or faulty fuel pump wire harness or fuel pump relay.
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