How to fix a Chevy/GMC P0301 engine code: Cylinder 1 Misfire Detected
A P0301 code is set when the computer (ECM/PCM) reads several misfires have occurred in Cylinder-1.
A misfire is when a cylinder fuel/air mixture is not ignited.
If you have multiple misfire codes, there may be other issues, such as a bad fuel pump or MAF sensor.

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Possible Causes of a P0301 Code
Bad Spark Plug or Spark Plug Wire
Bad Coil
Bad Fuel Injector
If Equipped, Distributor Cap

How to Troubleshoot a P0301 Code:
Locate Cylinder 1
Check for Spark
Check Spark Plug Wires and Coil
Check Spark Plug
Check Fuel Injector Wiring
Test Fuel Injector

By using this information user assumes all risk of use.
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