Question about 1997 GMC Sierra
Changed plugs. wires,and disb cap still have code P0301
Try Removing the ECM Fuse on the Fuse Panel for about 2 to 3 Minutes. This should reset all the Codes And, Since you have replaced stuff already you should be able to Narrow down or Eleminate this Problem. Let me Know!
Posted on Jan 02, 2009
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Posted on Jan 02, 2017
Tips for a great answer:
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P0300?? Multiple Cylinder Misfire
P0301?? Cylinder #1 Misfire
P0307?? Cylinder #7 Misfire
are the codes start with the basics inspect plugs wires cap rotor and if all checks out do a compression test
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