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1,160 Posts
What your saying is ! If i had the GM lap top on this car or my Efilive scan tool i would see knock retard all the time on light throttle and at normal cruiseing speeds it would show knock retard and be pulling a few degrees timeing under these conditions? If i have it right i would say something is wrong with the engine.The coolant is completely full right(the over flow tank shows full level) Going by my car tuned i never see knock retard as showing on the lap top or scan tool under the above condition.Even at wot i may see slight knock retard on the first pull and none to speak over doing back to back pulls up threw the gears