How can we fix this sparking knocking problem

2003 GMC SONOMA
65,000 MILES
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STJUNGMAN
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  • 1 POST
our truck seems to be spark knocking. When in drive it won't move. The motor seems to just bounce all over. We did a full tune up. The service engine light is not on. It only does it in drive with a load on it.
Jun 27, 2012 at 2:20 AM
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