2000 Gmc Jimmy Jimmy Vortec Motor Showing Code P0300

2000 GMC JIMMY
105,000 MILES
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DEREK926
  • MEMBER
  • 6 POSTS
I put on new plugs, wires, cap and rotor,and still runs rough and showing same code, what else could it be?
Jan 11, 2012 at 10:07 PM
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