how do you repair the po301 problem on the 2003
chevy trailblazer?
Dec 13, 2010 at 1:50 AM
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WRENCHTECH
CERTIFIED EXPERT
20,761 POSTS
The only thing the code is telling you is that you have a misfire on cylinder #1. Now someone has to determine what is causing it. You always want to look at the secondary ignition components first like plugs, wires, cap and rotor.