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lost all spark on 1999 GMC 454 Vortec

 
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PostPosted: Wed Aug 02, 2006 12:19 pm    Post subject: lost all spark on 1999 GMC 454 Vortec Reply with quote
I have replaced everything, pick up coil, rotor, cap, wires, coil, ign mod., and crank sensor and still no spark. Where do I need to look? ECM maybe?
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