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1997 GMC K1500 Sierra SL 5.7L Egr VIN: 2GTEK19R6V
mifsire/rich mixture codes cap,rotor,wires,plugs now new. traced to #1 & 3 cylinders as the culprits & as the egr is right between them, went old school & made a plate to essentially take it out of the picture. all codes gone & idling smooth, only code now...
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