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Ignition Pattern
We replaced plugs and wires on this truck in December and it just came back with a p0300. I'm getting this ignition pattern. [2002 GMC Sierra 1500, Ignition waveform] The spark line is .5-1 volts and has no oscillations at the end. Fuel trims are ok at idle an... Login to read more.
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| Engine | 5.3 L |
| Trans | 4-speed Automatic (Electronic) |
Vehicle Data
2002 GMC Sierra 1500 5.3L
| Engine | 5.3 L |
| Trans | 4-speed Automatic (Electronic) |
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