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2013 3500hd crew 6.6 bed 6.0 vortec 52,000 miles . Engine code for plug wire cylinder 7 , replaced all 8 plugs and wires, 100 miles later , code for cylinder7 coil pack , replaced with A/C delco coil pack, 5 miles , now saying o2 sensor?????. not desiring to chase codes
 

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IMO another GM engine failure 2013 6L...
need to post codes .. no response because no detailed code info ..
 

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how much oil is it burning up ... if it burns up the engine oil then it is dead. cost 8K to fix it ..total replacement ..
 
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